Power management and ACPI material for 3.19-rc3

 - Fix for a potential NULL pointer dereference in the cpufreq
   core due to an initialization race condition (Ethan Zhao).

 - Fixes for abuse of the OPP (Operating Performance Points) API
   related to RCU and other minor issues in the OPP library and
   the cpufreq-dt driver (Dmitry Torokhov).

 - cpuidle governors cleanup making them measure idle duration in
   a better way without using the CPUIDLE_FLAG_TIME_INVALID flag
   which allows that flag to be dropped from the ACPI cpuidle driver
   and from the core too (Len Brown).

 - New ACPI backlight blacklist entries for Samsung machines
   without a working native backlight interface that need to
   use the ACPI backlight instead (Aaron Lu).

 - New CPU IDs of future Intel Xeon CPUs for the Intel RAPL power
   capping driver (Jacob Pan).

 - Generic power domains framework modification to export the
   of_genpd_get_from_provider() function to modular drivers that
   will allow future driver modifications to be based on the mainline
   (Amit Daniel Kachhap).

 - Two fixes for the cpupower tool (Michal Privoznik, Prarit Bhargava).

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