libatomic: Do not enforce march on aarch64

Inspired by The Yocto Project [1].

[1] https://github.com/yoctoproject/poky/blob/51192a79f1717786dda42776f916c3d97ada7971/meta/recipes-devtools/gcc/gcc/0022-libatomic-Do-not-enforce-march-on-aarch64.patch

Signed-off-by: Konstantin Demin <rockdrilla@gmail.com>

 libatomic/Makefile.am | 1 -
 libatomic/Makefile.in | 1 -
 2 files changed, 2 deletions(-)

--- a/libatomic/Makefile.am
+++ b/libatomic/Makefile.am
@@ -130,7 +130,6 @@ libatomic_la_LIBADD = $(foreach s,$(SIZE
 ## On a target-specific basis, include alternates to be selected by IFUNC.
 if HAVE_IFUNC
 if ARCH_AARCH64_LINUX
-IFUNC_OPTIONS	     = -march=armv8-a+lse
 libatomic_la_LIBADD += $(foreach s,$(SIZES),$(addsuffix _$(s)_1_.lo,$(SIZEOBJS)))
 
 endif
--- a/libatomic/Makefile.in
+++ b/libatomic/Makefile.in
@@ -452,7 +452,6 @@ M_SRC = $(firstword $(filter %/$(M_FILE)
 libatomic_la_LIBADD = $(foreach s,$(SIZES),$(addsuffix \
 	_$(s)_.lo,$(SIZEOBJS))) $(am__append_1) $(am__append_2) \
 	$(am__append_3) $(am__append_4)
-@ARCH_AARCH64_LINUX_TRUE@@HAVE_IFUNC_TRUE@IFUNC_OPTIONS = -march=armv8-a+lse
 @ARCH_ARM_LINUX_TRUE@@HAVE_IFUNC_TRUE@IFUNC_OPTIONS = -march=armv7-a+fp -DHAVE_KERNEL64
 @ARCH_I386_TRUE@@HAVE_IFUNC_TRUE@IFUNC_OPTIONS = -march=i586
 @ARCH_X86_64_TRUE@@HAVE_IFUNC_TRUE@IFUNC_OPTIONS = -mcx16 -mcx16
