selftests/powerpc: Convert pmu Makefile to for loop style

The pmu Makefile has grown more sub directories over the years. Rather
than open coding the rules for each subdir, use for loops.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240422133453.1793988-1-mpe@ellerman.id.au
This commit is contained in:
Michael Ellerman 2024-04-22 23:34:52 +10:00
commit 822a04957c