ARM: dts: sun8i: v3s: Fix Display Engine DTC warnings

Our display engine endpoints trigger some DTC warnings due to the fact that
we're having a single endpoint that doesn't need any reg property, and
since we don't have a reg property, we don't need the address-cells and
size-cells properties anymore.

Fix those
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>

arch/arm/boot/dts/sun8i-v3s.dtsi

@@ -129,12 +129,9 @@ ports {
 				#size-cells = <0>;
 
 				mixer0_out: port@1 {
-					#address-cells = <1>;
-					#size-cells = <0>;
 					reg = <1>;
 
-					mixer0_out_tcon0: endpoint@0 {
-						reg = <0>;
+					mixer0_out_tcon0: endpoint {
 						remote-endpoint = <&tcon0_in_mixer0>;
 					};
 				};
@@ -159,12 +156,9 @@ ports {
 				#size-cells = <0>;
 
 				tcon0_in: port@0 {
-					#address-cells = <1>;
-					#size-cells = <0>;
 					reg = <0>;
 
-					tcon0_in_mixer0: endpoint@0 {
-						reg = <0>;
+					tcon0_in_mixer0: endpoint {
 						remote-endpoint = <&mixer0_out_tcon0>;
 					};
 				};