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

* pm-domains:
  PM / Domains: provide pm_genpd_poweroff_noirq() stub
  Revert "PM / Domains: Handle safely genpd_syscore_switch() call on non-genpd device"

* pm-sleep:
  PM / sleep: constify attribute_group structures

* pm-cpufreq:
  cpufreq: intel_pstate: constify attribute_group structures
  cpufreq: cpufreq_stats: constify attribute_group structures