Merge arlied/drm-next into drm-misc-next

We need to pull 66660d4cf21b (drm: add connector info/property for
non-desktop displays [v2]) into drm-misc-next to continue the development
of the display rotation series.

Effectively this also pulls 4.15-r2 into drm-misc-next.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>

diff --cc Documentation/devicetree/bindings/vendor-prefixes.txt
Simple merge

diff --cc Documentation/gpu/todo.rst
Simple merge

diff --cc MAINTAINERS
Simple merge

diff --cc drivers/gpu/drm/arm/malidp_drv.c
Simple merge

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