Merge branches 'pm-sleep' and 'pm-cpufreq'

Merge branches 'pm-sleep' and 'pm-cpufreq'

* pm-sleep:
  Documentation: PM: sleep: Document system-wide suspend code flows
  PM: sleep: Add pm_debug_messages kernel command line option
  PM: sleep: core: Drop racy and redundant checks from device_prepare()
  PM: hibernate: Propagate the return value of hibernation_restore()

* pm-cpufreq:
  cpufreq: Select schedutil when using big.LITTLE
  cpufreq: intel_pstate: Select schedutil as the default governor