arm64: dts: ulcb: Add HDMI output connector

The ULCB board has one HDMI output connector.

This connector is available on both the H3 and M3-W ULCB boards.
Add this to the ulcb.dtsi file.
Signed-off-by: Vladimir Barinov <vladimir.barinov+renesas@cogentembedded.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/ulcb.dtsi

@@ -34,6 +34,16 @@ audio_clkout: audio-clkout {
 		clock-frequency = <11289600>;
 	};
 
+	hdmi0-out {
+		compatible = "hdmi-connector";
+		type = "a";
+
+		port {
+			hdmi0_con: endpoint {
+			};
+		};
+	};
+
 	keyboard {
 		compatible = "gpio-keys";