drm/rcar-du: Add support for the r8a7791 DU

The r8a7791 DU is a stripped-down version of the r8a7790 DU with two
CRTCs and a single LVDS output.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
(cherry picked from commit 29ee6469e6138115420236a71c6b89bf8af1788a)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
1 file changed