Power management fixes for v4.13-rc6 - Disable interrupts around reading IA32_APERF and IA32_MPERF in aperfmperf_snapshot_khz() (introduced recently) to avoid excessive delays between the reads that may result from interrupt handling (Doug Smythies). - Fix the comutation of the CPU frequency to be reported through the pstate_sample tracepoint in intel_pstate (Doug Smythies).