serrano: Use custom PowerHAL

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

Change-Id: If2e7ccda70a4f34e5fda0de3488e2ce33c131748
serrano: Remove obsolete LPA prop

 * Not used anymore

Change-Id: I034ea6e88fb0431870651e4debd1d1b2d1a04f58
Merge branch 'cm-11.0' into kk_mkt

Conflicts:
	BoardConfigCommon.mk

Change-Id: I4a4f2293a9561ddd9247b98d2b57c81c5002ce9c