h/q/d: Add support to update framebuffer partially

For dual DSI panels, when enabled partial update AND framebuffer rect
optimization, it is not necessary to update both the halves of
the framebuffer every frame. This channge adds support to update
framebuffer based on the updating region generated.

Change-Id: Ia63a8b9ac0e915c04e06122a16471ee18b5a8272
1 file changed