[PATCH v2 10/12] selftests/powerpc: Add more utility macros

[Russell Currey]

On Thu, 2023-03-30 at 16:50 +1100, Benjamin Gray wrote:
> * Include unistd.h for _exit()
> * Include stdio.h for fprintf()
> * Adds _MSG assertion variants to provide more context behind why a
>   failure occurred.
> * Move ARRAY_SIZE macro to utils.h
> 
> The _MSG variants and ARRAY_SIZE will be used by the following
> DEXCR selftests.
> 
> Signed-off-by: Benjamin Gray <bgray at linux.ibm.com>
> 

I'd prefer if your commit message led with adding FAIL_IF_MSG etc and
then mentioned the other changes to support it.  It's unintuitive to
read as-is.

Reviewed-by: Russell Currey <ruscur at russell.cc>