KVM/ARM Fixes for v4.6-rc4

Addresses:
 - Wrong indentation in the PMU code from the merge window
 - A long-time bug occuring with running ntpd on the host, candidate for stable
 - Properly handle (and warn about) the unsupported configuration of running on
   systems with less than 40 bits of PA space
 - More fixes to the PM and hotplug notifier stuff from the merge window