MIPS: VDSO: Drop duplicated -I*/-E* aflags

The aflags-vdso is based on ccflags-vdso, which already contains the -I*
and -EL/-EB flags from KBUILD_CFLAGS, but those flags are needlessly
added again to aflags-vdso.

Drop the duplication.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Reported-by: Maciej W. Rozycki <macro@imgtec.com>
Reviewed-by: Maciej W. Rozycki <macro@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14369/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Author: James Hogan

arch/mips/vdso/Makefile

@@ -13,8 +13,6 @@ cflags-vdso := $(ccflags-vdso) \
 	-DDISABLE_BRANCH_PROFILING \
 	$(call cc-option, -fno-stack-protector)
 aflags-vdso := $(ccflags-vdso) \
-	$(filter -I%,$(KBUILD_CFLAGS)) \
-	$(filter -E%,$(KBUILD_CFLAGS)) \
 	-D__ASSEMBLY__ -Wa,-gdwarf-2
 
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