hwc: Do not re-program H/W, if the frame geometry has not changed

There is no need to re-program the H/W, if the frame geometry of all
active displays, has not changed. It will help to improve performance
by avoiding re-configuration of HAL and driver, if it is not needed.

Change-Id: Ie01dce33be89afc7308a8103128d27b4b9fb5c4b
3 files changed