Merge branch 'pm-cpufreq'

Additional cpufreq updates for 4.18-rc1: fixes and cleanups in the
core and drivers and intel_pstate extension to do iowait boosting
on systems with HWP that improves performance quite a bit.

* pm-cpufreq:
  cpufreq: imx6q: check speed grades for i.MX6ULL
  cpufreq: governors: Fix long idle detection logic in load calculation
  cpufreq: intel_pstate: enable boost for Skylake Xeon
  cpufreq: intel_pstate: New sysfs entry to control HWP boost
  cpufreq: intel_pstate: HWP boost performance on IO wakeup
  cpufreq: intel_pstate: Add HWP boost utility and sched util hooks
  cpufreq: ti-cpufreq: Use devres managed API in probe()
  cpufreq: ti-cpufreq: Fix an incorrect error return value
  cpufreq: ACPI: make function acpi_cpufreq_fast_switch() static
  cpufreq: kryo: allow building as a loadable module