Enable the HDMI encoder for ULCB board and hook it up to the HDMI connector.

The HDMI encoder and connector are available on both the H3 and M3-W ULCB boards.
Add them to the ulcb.dtsi file.
Signed-off-by: Vladimir Barinov <vladimir.barinov+renesas@cogentembedded.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>