Revert "msm7x27a-common: remove power hal from device tree"

This reverts commit 4c1ba0534348416b8b558bfe7048bd09eabdd53f.

Change-Id: Ic0839a62a4f3e649b4192d2d0a537abee3c5790c
power: Remove timer/sampling rate management.

Change-Id: Ib295b86cd4a86dd661f578708dae48398c990095
power: tune ondemand sampling_rate , interactive,timer_rate and fix interactive hispeed_freq

Change-Id: Ib107e0f58ec1edfd9f9055998682356d531c2afc