core/cortex-m0: Fix div.S compilation with clang
core/cortex-m0: Fix div.S compilation with clang

Add an additional label at the same address as __aeavi_uidivmod to work
around a linker crash crash when using clang:

ld.lld: error: core/cortex-m0/div.S:51:(.text+0x10): internal linker
error: cannot read addend for relocation R_ARM_THM_JUMP8

BRANCH=none
BUG=b:172020503, b:205351146
TEST=./util/compare_build.sh -b all -j 120
     => MATCH

Signed-off-by: Tom Hughes <fc5c12f30a5ed2baa0581f44ee14ad1eb7b20d83@chromium.org>
Change-Id: I5a7f682377311e881ac2bcdb85b854127f5907ba
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3265867
Reviewed-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec