Merge branch 'topic/ppc-kvm' into next

Merge the topic branch we share with kvm-ppc, this brings in two xive
commits, one from Paul to rework HMI handling, and a minor cleanup to
drop an unused flag.

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

diff --cc arch/powerpc/kvm/book3s_hv_ras.c
Simple merge

diff --cc arch/powerpc/kvm/book3s_hv_rmhandlers.S
Simple merge

diff --cc arch/powerpc/sysdev/xive/common.c
Simple merge