[kselftests/powerpc] Primitives test build failure with linux-next

[Sachin Sant]

Powerpc specific selftests (specifically powerpc/primitives) included in linux-next
tree fails to build with following error

gcc -std=gnu99 -O2 -Wall -Werror -DGIT_VERSION='"next-20240229-0-gf303a3e2bcfb-dirty"' -I/home/sachin/linux-next/tools/testing/selftests/powerpc/include  -I/home/sachin/linux-next/tools/testing/selftests/powerpc/primitives    load_unaligned_zeropad.c ../harness.c  -o /home/sachin/linux-next/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad
In file included from load_unaligned_zeropad.c:26:
word-at-a-time.h:7:10: fatal error: linux/bitops.h: No such file or directory
    7 | #include <linux/bitops.h>
      |          ^~~~~~~~~~~~~~~~
compilation terminated.

The header file in question was last changed by following commit

commit 66a5c40f60f5d88ad8d47ba6a4ba05892853fa1f
    kernel.h: removed REPEAT_BYTE from kernel.h

Thanks
— Sachin