pm-extra-4.13-rc1

 - Revert a recent change in the generic power domains (genpd)
   framework that led to regressions and turned out the be misguided
   (Rafael Wysocki).

 - Fix a recently introduced build issue in the generic power domains
   (genpd) framework (Arnd Bergmann).

 - Constify attribute_group structures in the PM core, the cpufreq
   stats code and in intel_pstate (Arvind Yadav).