cm3629: Restore stock sleeps

The sleeps inside lightsensor_enable are necessary to prevent the
backlight work queue filling before sensor values are ready. The sleep
inside psensor_enable seems to not be necessary, so it remains excluded,
cutting down on screen-on lag.

Change-Id: I107d7c09d199b332bf192a1c6e5f83be44e8dc7f
1 file changed