Merge remote-tracking branch 'drm/drm-next' into msm-next-backmerge

Backmerge of drm-next, mainly to pick up dt bindings docs updates to
avoid conflicts.

Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>

diff --cc drivers/gpu/drm/msm/dsi/dsi_host.c
Simple merge

diff --cc drivers/gpu/drm/msm/msm_ringbuffer.c
Simple merge