Power management fixes for v4.7-rc5

 - Fix a latent initialization issue in the pcc-cpufreq driver
   (incorrect initial value of a structure field) that has been
   uncovered by a recent ACPICA commit (Mike Galbraith).

 - Add a missing notification in an update_devfreq() error code
   path forgotten by a recent devfreq commit (Chanwoo Choi).

 - Fix devfreq device frequency initialization (Lukasz Luba).

 - Fix an incorrect IS_ERR() check in the devfreq framework
   discovered by the Smatch checker (Dan Carpenter).

 - Drop two excessive put_device() calls from the devfreq framework
   (MyungJoo Ham, Cai Zhiyong).

 - Fix a possible memory leak in the devfreq framework and drop an
   unnecessary kfree() invocation from it (MyungJoo Ham).
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