hammerhead: Update cpufreq settings

 * QC is switching to interactive. We will too.

Change-Id: I1ea4bdc75108136aa4b96e91da1a661b0b5d2b07
hammerhead: disable cpu-boost

* The CPU-boost driver doesn't seem to behave correctly quite yet,
  disable it until it can be fixed.

Change-Id: Idec7151b6324d182828c748ff781de92d320e4f9
Tune interactive gov

Thx to cm