Merge remote-tracking branch 'quic/dev/msm-4.14-display' into msm-4.14

* quic/dev/msm-4.14-display:
  drm/msm/dsi-staging: defer dsi probe if backlight enable gpio not found
  drm/msm/dp: protect power on/off functionalities with mutex
  msm/drm/sde: fix recursive clock enablement in sde_reg_dump

Change-Id: Ibdf0015870ebf56cb4565d1a8a342b8f998c68b9
Signed-off-by: Namratha Siddappa <namratha@codeaurora.org>