drm/dsi: Do not require .owner field to be set

Drivers now no longer need to set the .owner field. It will be
automatically set at registration time.

Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --cc drivers/gpu/drm/drm_mipi_dsi.c
Simple merge

diff --cc drivers/gpu/drm/panel/panel-s6e8aa0.c
Simple merge

diff --cc drivers/gpu/drm/panel/panel-simple.c
Simple merge

diff --cc include/drm/drm_mipi_dsi.h
Simple merge