Merge branch 'topic/ppc-kvm' into next

Merge some more commits from our KVM topic branch. In particular this
brings in some commits that depend on a new capability that was merged
via the KVM tree for v5.18.

diff --cc arch/powerpc/include/asm/setup.h
Simple merge

diff --cc arch/powerpc/kernel/setup_64.c
Simple merge

diff --cc arch/powerpc/platforms/pseries/setup.c
Simple merge