m7: Configure ondemand governor

 * Idle loop on M7 is janky due to power management implementation,
   which screws up the interactive governor.
 * Switch to ondemand governor and configure it correctly.

Change-Id: I563071a5bc08c20ab6217994dea98d92feeaaf8c
m7: Add init script for recovery

 * Configure power options for recovery

Change-Id: I6eba30232f1da453d3673541849085d83dd83967