[SPARC64]: Remove Makefile code for ancient gcc and binutils.

The kernel hasn't supported the compilers which need these tests
for years.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/sparc64/Makefile

@@ -12,39 +12,12 @@ CHECKFLAGS	+= -D__sparc__ -D__sparc_v9__ -m64
 
 CPPFLAGS_vmlinux.lds += -Usparc
 
-CC		:= $(shell if $(CC) -m64 -S -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo $(CC); else echo sparc64-linux-gcc; fi )
-
-NEW_GCC := $(call cc-option-yn, -m64 -mcmodel=medlow)
-NEW_GAS := $(shell if $(LD) -V 2>&1 | grep 'elf64_sparc' > /dev/null; then echo y; else echo n; fi)
-UNDECLARED_REGS := $(shell if $(CC) -c -x assembler /dev/null -Wa,--help | grep undeclared-regs > /dev/null; then echo y; else echo n; fi; )
-
-ifneq ($(NEW_GAS),y)
-AS		= sparc64-linux-as
-LD		= sparc64-linux-ld
-NM		= sparc64-linux-nm
-AR		= sparc64-linux-ar
-RANLIB		= sparc64-linux-ranlib
-else
-AS		:= $(AS) -64
 LDFLAGS		:= -m elf64_sparc
-endif
 
-ifneq ($(UNDECLARED_REGS),y)
-CC_UNDECL	=
-else
-CC_UNDECL	= -Wa,--undeclared-regs
-AS		:= $(AS) --undeclared-regs
-endif
-
-ifneq ($(NEW_GCC),y)
-  KBUILD_CFLAGS += -pipe -mno-fpu -mtune=ultrasparc -mmedlow \
-	    -ffixed-g4 -ffixed-g5 -fcall-used-g7 -Wno-sign-compare
-else
-  KBUILD_CFLAGS += -m64 -pipe -mno-fpu -mcpu=ultrasparc -mcmodel=medlow \
+KBUILD_CFLAGS += -m64 -pipe -mno-fpu -mcpu=ultrasparc -mcmodel=medlow \
 	-ffixed-g4 -ffixed-g5 -fcall-used-g7 -Wno-sign-compare \
-	    $(CC_UNDECL)
-  KBUILD_AFLAGS += -m64 -mcpu=ultrasparc $(CC_UNDECL)
-endif
+	-Wa,--undeclared-regs
+KBUILD_AFLAGS += -m64 -mcpu=ultrasparc -Wa,--undeclared-regs
 
 ifeq ($(CONFIG_MCOUNT),y)
   KBUILD_CFLAGS += -pg