.gitignore: add SPDX License Identifier

Add SPDX License Identifier to all .gitignore files.
Signed-off-by: NMasahiro Yamada <masahiroy@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 #
 # NOTE! Don't add files that are generated in specific
 # subdirectories here. Add them in the ".gitignore" file

Documentation/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 output
 *.pyc

Documentation/devicetree/bindings/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 *.example.dts
 processed-schema.yaml

Documentation/vm/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 page-types
 slabinfo

arch/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 i386
 x86_64

arch/alpha/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

arch/arc/boot/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 uImage

arch/arc/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

arch/arm/boot/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 Image
 zImage
 xipImage

arch/arm/boot/compressed/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 ashldi3.S
 bswapsdi2.S
 font.c

arch/arm/crypto/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 aesbs-core.S
 sha256-core.S
 sha512-core.S

arch/arm/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

arch/arm/mach-at91/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 pm_data-offsets.h

arch/arm/mach-omap2/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 pm-asm-offsets.h

arch/arm/vdso/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds
 vdso.so.raw
 vdsomunge

arch/arm64/boot/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 Image
 Image.gz

arch/arm64/crypto/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 sha256-core.S
 sha512-core.S

arch/arm64/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

arch/arm64/kernel/vdso/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds

arch/arm64/kernel/vdso32/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds
 vdso.so.raw

arch/ia64/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 gate.lds
 vmlinux.lds

arch/m68k/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

arch/microblaze/boot/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 linux.bin*
 simpleImage.*

arch/microblaze/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

arch/mips/boot/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 mkboot
 elf2ecoff
 vmlinux.*

arch/mips/boot/compressed/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 ashldi3.c
 bswapsi.c

arch/mips/boot/tools/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 relocs

arch/mips/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

arch/mips/tools/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 elf-entry
 loongson3-llsc-check

arch/mips/vdso/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 *.so*
 vdso-*image.c
 genvdso

arch/nds32/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

arch/nds32/kernel/vdso/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds

arch/nios2/boot/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmImage

arch/nios2/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

arch/openrisc/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

arch/parisc/boot/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 image
 bzImage

arch/parisc/boot/compressed/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 firmware.c
 real2.S
 sizes.h

arch/parisc/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

arch/powerpc/boot/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 addnote
 decompress_inflate.c
 empty.c

arch/powerpc/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 prom_init_check
 vmlinux.lds

arch/powerpc/kernel/vdso32/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vdso32.lds
 vdso32.so.dbg

arch/powerpc/kernel/vdso64/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vdso64.lds
 vdso64.so.dbg

arch/powerpc/platforms/cell/spufs/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 spu_save_dump.h
 spu_restore_dump.h

arch/powerpc/purgatory/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 kexec-purgatory.c
 purgatory.ro

arch/riscv/boot/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 Image
 Image.gz
 loader

arch/riscv/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 /vmlinux.lds

arch/riscv/kernel/vdso/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds
 *.tmp

arch/s390/boot/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 image
 bzImage
 section_cmp.*

arch/s390/boot/compressed/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux
 vmlinux.lds

arch/s390/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

arch/s390/kernel/vdso64/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vdso64.lds

arch/s390/purgatory/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 purgatory
 purgatory.chk
 purgatory.lds

arch/s390/tools/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 gen_facilities
 gen_opcode_table

arch/sh/boot/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 zImage
 vmlinux*
 uImage*

arch/sh/boot/compressed/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 ashiftrt.S
 ashldi3.c
 ashlsi3.S

arch/sh/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

arch/sh/kernel/vsyscall/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vsyscall.lds

arch/sparc/boot/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 btfix.S
 btfixupprep
 image

arch/sparc/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

arch/sparc/vdso/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds
 vdso-image-*.c
 vdso2c

arch/sparc/vdso/vdso32/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vdso32.lds

arch/um/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 kernel/config.c
 kernel/config.tmp
 kernel/vmlinux.lds

arch/unicore32/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Generated include files
 #

arch/x86/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 boot/compressed/vmlinux
 tools/test_get_len
 tools/insn_sanity

arch/x86/boot/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 bootsect
 bzImage
 cpustr.h

arch/x86/boot/compressed/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 relocs
 vmlinux.bin.all
 vmlinux.relocs

arch/x86/boot/tools/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 build

arch/x86/crypto/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 poly1305-x86_64-cryptogams.S

arch/x86/entry/vdso/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds
 vdsox32.lds
 vdso32-syscall-syms.lds

arch/x86/entry/vdso/vdso32/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vdso32.lds

arch/x86/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vsyscall.lds
 vsyscall_32.lds
 vmlinux.lds

arch/x86/kernel/cpu/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 capflags.c

arch/x86/lib/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 inat-tables.c

arch/x86/realmode/rm/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 pasyms.h
 realmode.lds
 realmode.relocs

arch/x86/tools/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 relocs

arch/x86/um/vdso/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds

arch/xtensa/boot/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 uImage
 zImage.redboot

arch/xtensa/boot/boot-elf/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 boot.lds

arch/xtensa/boot/lib/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 inffast.c
 inflate.c
 inftrees.c

arch/xtensa/kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds

certs/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 x509_certificate_list

drivers/atm/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 fore200e_mkfirm
 fore200e_pca_fw.c
 pca200e.bin

drivers/crypto/vmx/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 aesp8-ppc.S
 ghashp8-ppc.S

drivers/eisa/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 devlist.h

drivers/gpu/drm/i915/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 *.hdrtest

drivers/gpu/drm/radeon/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 mkregtable
 *_reg_safe.h
 

drivers/memory/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 ti-emif-asm-offsets.h

drivers/net/wan/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 wanxlfw.inc

drivers/scsi/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 53c700_d.h
 scsi_devinfo_tbl.c

drivers/scsi/aic7xxx/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 aic79xx_reg.h
 aic79xx_reg_print.c
 aic79xx_seq.h

drivers/staging/comedi/drivers/ni_routing/tools/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 comedi_h.py
 *.pyc
 ni_values.py

drivers/staging/greybus/tools/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 loopback_test

drivers/video/logo/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 *_mono.c
 *_vga16.c
 *_clut224.c

drivers/zorro/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 devlist.h
 gen-devlist

fs/unicode/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 mkutf8data
 utf8data.h

kernel/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 kheaders.md5
 timeconst.h
 hz.bc

kernel/debug/kdb/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 gen-kdb_cmds.c

lib/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 gen_crc32table
 gen_crc64table
 crc32table.h

lib/raid6/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 mktables
 altivec*.c
 int*.c

net/bpfilter/.gitignore

+# SPDX-License-Identifier: GPL-2.0-only
 bpfilter_umh