Merge tag 'du-next-20190328' of git://linuxtv.org/pinchartl/media into drm-next

R-Car DU miscellaneous changes for v5.2

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190328042035.GA4846@pendragon.ideasonboard.com