Fix Whitescreen

In my testing this seems to at least partial fix the whitescreen, with the revert to mdp4_overlay_lcdc for battery drain.

It doesnt 100% solve it but the white screen is now a partial image of what should be displayed and it only occures after turning the screen on/off rapidly in a small amount of time. Other then that it seems to work every time i power on. As far as battery goes im not sure if this had any affect.

Looking at the new code there seems to be a commented delay, maybe that might change it the rest of the way? Or where it says set display init after 2 sec maybe increase it to 3?

These where taken from old/newer kernel drop from samsung from ancora_tmo

Edit: I was testing as i was makeing this and it doesnt seem to be related to rapid on/off, it does maybe seem better? And it isnt a full white screen its a partial image like stated above.(improvement?)