qcom_power: add TARGET_PROVIDES_POWERHAL

Change-Id: Ic6f8777025389b94aa3ddb476caf07e93cb0df6b

Conflicts:
	Android.mk
power: Allow passing socket name from config

 * MPDecision on Mako is different from Flo.

Change-Id: Ibbff7d97d841ad379091c7df8da8dc04de4f4d5f