[PATCH] selftests/arm64: Fix build warnings for abi

[Will Deacon]

On Tue, Aug 27, 2024 at 10:48:51AM +0530, Dev Jain wrote:
> A "%s" is missing in ksft_exit_fail_msg(); instead, use the newly
> introduced ksft_exit_fail_perror(). Also, uint64_t corresponds to
> unsigned 64-bit integer, so use %lx instead of %llx.

What's wrong with using %llx for a uint64_t? I think that part of the
code is fine as-is.

Will