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

* quic/dev/msm-4.14-display:
  drm/msm/dsi-staging: add support to enable backlight through PWM
  drm/msm/dp: protect edid and dpcd buffers with mutex
  drm/msm/dsi-staging: avoid out of bounds access of ctrl array
  drm/msm/dsi-staging: null pointer check at once after call dsi_panel_get
  drm/msm/dsi-staging: Add support for dynamically switch dsi clock
  drm/msm/dsi-staging: fix dsi underflow errors during clock switch
  drm_dp_mst_topology: fix broken drm_dp_sideband_parse_remote_dpcd_read()
  drm/msm/dp: changes to prevent null pointer dereference

Change-Id: I0c06264a453cef4d3f4901ddeca9613c200ad9ad
Signed-off-by: Namratha Siddappa <namratha@codeaurora.org>