common-qcom: Make QC PowerHAL opt-in

 * Set TARGET_POWERHAL_VARIANT=qcom to use this version.

Change-Id: Iedf6ab57611e90b75304a515f93678a9b85e32e1
common-qcom: enable custom module name extension

Change-Id: I34d141ec19c3f01e7404067db4cbd493b5865d3a
Merge "common-qcom: enable custom module name extension" into cm-11.0