hammerhead: Add qcom perf library, update mpdecision

Also, remove a deprecated flag.

Change-Id: I045f36f72c66ace155c5cb40c7345ef0d8271e29
hammerhead: Configure ondemand governor

This will configure both, ondemand and interactive governors,
the latter will be default.

Change-Id: I65c01ad068fb2ead0eb8c102e1ed1beea4d4976e
hammerhead: Configure old power management

And noop is default I/O scheduler now.

Change-Id: Ib629f584457e4ba5ec4ff76554c06df0f9cb68ca