Revert "Remove and include hwc from hardware/omap3"

This reverts commit cd0483daca0e146cffa9744431df3ac803bfac43.
Update to latest omap3 sources

Change-Id: I987ff00e5d53bb094f77c210ea093a3108bab4bd
Power cleanup

Change-Id: I6836ae7473f60e7adb3fb6286dbd650fe829285a