arch/ppc64: Make PPC64 stages select ARCH_PPC64

Also don't define the default as this result in spurious lines in the
.config.

This also cleans up an unused Kconfig file.

In the generated config.h CPU_QEMU_POWER8 is gone as expected and
ARCH_RAMSTAGE_PPC64 moves a few lines, but the value stays the same.

Change-Id: I70b64e49e1ce07b8f30d9bbc493272bdfb3bb0bf
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31314
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

0 files changed, 0 insertions, 0 deletions