Merge changes I4d5d73ab,I6e076344,I6cf6035d,I29faa348 into msm-3.0

* changes:
  Perf: Use CPU PM notifiers to save and restore PMU regs
  ARM: cpu_pm: Add cpu power management notifiers
  ARM: Perfevents: Add mode exclusion support for Krait P2
  Perf: Fix detection of Krait implementation events