kbuild: remove unused AS assignment

$(AS) is not used anywhere in the kernel build, hence commit
aa824e0c ("kbuild: remove AS variable") killed it.

Remove the left-over code in arch/{arm,arm64}/Makefile.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Will Deacon <will@kernel.org>

arch/arm/Makefile

@@ -45,12 +45,10 @@ endif
 ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
 KBUILD_CPPFLAGS	+= -mbig-endian
 CHECKFLAGS	+= -D__ARMEB__
-AS		+= -EB
 KBUILD_LDFLAGS	+= -EB
 else
 KBUILD_CPPFLAGS	+= -mlittle-endian
 CHECKFLAGS	+= -D__ARMEL__
-AS		+= -EL
 KBUILD_LDFLAGS	+= -EL
 endif
 

arch/arm64/Makefile

@@ -84,7 +84,6 @@ KBUILD_CFLAGS += $(branch-prot-flags-y)
 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
 KBUILD_CPPFLAGS	+= -mbig-endian
 CHECKFLAGS	+= -D__AARCH64EB__
-AS		+= -EB
 # Prefer the baremetal ELF build target, but not all toolchains include
 # it so fall back to the standard linux version if needed.
 KBUILD_LDFLAGS	+= -EB $(call ld-option, -maarch64elfb, -maarch64linuxb)
@@ -92,7 +91,6 @@ UTS_MACHINE	:= aarch64_be
 else
 KBUILD_CPPFLAGS	+= -mlittle-endian
 CHECKFLAGS	+= -D__AARCH64EL__
-AS		+= -EL
 # Same as above, prefer ELF but fall back to linux target if needed.
 KBUILD_LDFLAGS	+= -EL $(call ld-option, -maarch64elf, -maarch64linux)
 UTS_MACHINE	:= aarch64