Merge branch 'topic/ppc-kvm' into next

Merge our topic branch shared with KVM. In particular this includes the
rewrite of the idle code into C.

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

diff --cc arch/powerpc/kernel/asm-offsets.c
Simple merge

diff --cc arch/powerpc/kernel/exceptions-64s.S
Simple merge

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

diff --cc arch/powerpc/kernel/setup-common.c
Simple merge

diff --cc arch/powerpc/platforms/powernv/opal-call.c
Simple merge