Revert "set the DEFAULT_GAMMA_LEVEL from 160CD to 20CD"

This reverts commit f7dabb62942bdf9f4d7dbfc721a8db05e399ab3a.
video: msm: lcdc_s6e63m0: Fixed flicker brightness when turning on the panel
Revert "msm: kgsl: Fix missing argument needed in 3.0 kernel"

This reverts commit 314f4f0a43885ce2175fd9f01099431d4edfbbeb.