More power management and ACPI fixes for v4.4-rc3

 - Fix a recent regression in the cpufreq core causing it to fail
   to clean up sysfs directories properly on cpufreq driver removal
   (Viresh Kumar).

 - Fix a build problem in the SCPI support code recently added to
   the arm_big_little cpufreq driver (Punit Agrawal).

 - Fix up the recently added CPPC cpufreq frontend to process the
   CPU coordination information provided by the platform firmware
   correctly (Ashwin Chaugule).

 - Fix the intel_pstate driver to behave as intended when switched
   over to the "performance" mode via sysfs if hardware-driven
   P-state selection (HWP) is enabled (Alexandra Yates).

 - Fix two rounding errors in the intel_pstate driver that sometimes
   cause it to use lower P-states than requested (Prarit Bhargava).

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