PM: devfreq: Add sysfs nodes for devfreq governors
Revert "PM: devfreq: Fix simple_ondemand crashing and update to the latest version"

This reverts commit 9fd199fe944dd0c867fd3cba33b0313eb88bc130.
devfreq: Re-enable simple_ondemand.   Also fix simple_ondemand crashing from GuneetAtwal