drivers: cpufreq: Send a uevent when governor changes

 * Useful so userspace tools can reconfigure.

Change-Id: Ib423910b8b9ac791ebe81a75bf399f58272f64f2
cpufreq: ondemand: sync-ed from kernel_msm 3.0 kernel
Boostpulse interface for Ondemand
Update ROW iosched
drivers:cpufreq: Remove perflock support