Power management fixes for v4.11-rc5

 - Symbolic links from CPU directories to the corresponding cpufreq
   policy directories in sysfs are not created during initialization
   in some cases which confuses user space, so prevent that from
   happening (Rafael Wysocki).

 - The powernv cpuidle driver fails to pass a correct cpumaks to
   the cpuidle core in some cases which causes subsequent failures
   to occur, so fix it (Vaidyanathan Srinivasan).
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