[WIP]: drivers/cpufreq: adapt code from htc msm8660 kernel to sync governor changes.

Most stock CAF based kernels have a "bug" where the CPU governor. when changed is only
changed on CPU cores that are running/active at the time. This correctly syncs acrooss
all cores.

Change-Id: Ibee0f33092843700b95d52b5ef83bba50bf86a25