Merge branch 'pm-opp'

* pm-opp: (24 commits)
  PM / Domains: Drop unused parameter in genpd_allocate_dev_data()
  PM / Domains: Drop genpd as in-param for pm_genpd_remove_device()
  PM / Domains: Drop __pm_genpd_add_device()
  PM / Domains: Drop extern declarations of functions in pm_domain.h
  PM / domains: Add perf_state attribute to genpd debugfs
  OPP: Allow same OPP table to be used for multiple genpd
  PM / Domain: Return 0 on error from of_genpd_opp_to_performance_state()
  PM / OPP: Fix shared OPP table support in dev_pm_opp_register_set_opp_helper()
  PM / OPP: Fix shared OPP table support in dev_pm_opp_set_regulators()
  PM / OPP: Fix shared OPP table support in dev_pm_opp_set_prop_name()
  PM / OPP: Fix shared OPP table support in dev_pm_opp_set_supported_hw()
  PM / OPP: silence an uninitialized variable warning
  PM / OPP: Remove dev_pm_opp_{un}register_get_pstate_helper()
  PM / OPP: Get performance state using genpd helper
  PM / Domain: Implement of_genpd_opp_to_performance_state()
  PM / Domain: Add support to parse domain's OPP table
  PM / Domain: Add struct device to genpd
  PM / OPP: Implement dev_pm_opp_get_of_node()
  PM / OPP: Implement of_dev_pm_opp_find_required_opp()
  PM / OPP: Implement dev_pm_opp_of_add_table_indexed()
  ...