Blackfin arch: -mno-fdpic works

now that -mno-fdpic works, force it on so that
we can use any blackfin toolchain to build up the
kernel and kernel modules

wrap -mno-fdpic in $(call cc-option,-mno-fdpic) so that older
toolchains will still work
Signed-off-by: NMike Frysinger <michael.frysinger@analog.com>
Signed-off-by: NBryan Wu <bryan.wu@analog.com>

arch/blackfin/Makefile

@@ -12,6 +12,8 @@ LDFLAGS_vmlinux  := -X
 OBJCOPYFLAGS     := -O binary -R .note -R .comment -S
 GZFLAGS          := -9
 
+CFLAGS           += $(call cc-option,-mno-fdpic)
+AFLAGS           += $(call cc-option,-mno-fdpic)
 CFLAGS_MODULE    += -mlong-calls
 KALLSYMS         += --symbol-prefix=_