Progress on KVM for Embedded PowerPC has stalled, but for Book3S there's quite
a lot of work to do and going on.

So in agreement with Hollis and Avi, we should switch maintainers for PowerPC.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Acked-by: NHollis Blanchard <hollis@penguinppc.org>
Signed-off-by: NAvi Kivity <avi@redhat.com>