Use custom PowerHAL

 * Based on CM PowerHAL, but modified to work better for
   this device and the current governors we use.

Change-Id: If2e7ccda70a4f34e5fda0de3488e2ce33c131748
Remove obsolete LPA prop

 * Not used anymore

Change-Id: I034ea6e88fb0431870651e4debd1d1b2d1a04f58