Document that the x86 CPU refactorings are going through the qom-cpu
tree. This does not contradict the established practice that patches
adding KVM features to the x86 CPU go through the KVM maintainers,
it merely takes it out of target-i386 TCG's Odd Fixes status.
Signed-off-by: NAndreas Färber <afaerber@suse.de>
Cc: Marcello Tosatti <mtosatti@redhat.com>