UPSTREAM: kvm: x86: move ioapic.c and irq_comm.c back to arch/x86/

ia64 does not need them anymore.  Ack notifiers become x86-specific
too.

BUG=chromium:846515
TEST=build/boot on hana with USE=kvm_host

Change-Id: I54a3b63912759ae50fd14825889d9005d883f7fe
Suggested-by: Gleb Natapov <gleb@kernel.org>
Reviewed-by: Radim Krcmar <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 6ef768fac9dfe3404d3fdc09909ea203a88f2f38)
Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1088076
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
9 files changed