ARM: dts: rockchip: fix rk3288 dp node

With the conversion of rockchip,analogix-dp.yaml a port@1 node
is required, so add a node with label edp_out.
Also restyle.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/0a423eb4-0ab6-7ecb-d450-d93639160dbc@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: Johan Jonker

arch/arm/boot/dts/rk3288.dtsi

@@ -1204,19 +1204,26 @@
 		ports {
 			#address-cells = <1>;
 			#size-cells = <0>;
+
 			edp_in: port@0 {
 				reg = <0>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+
 				edp_in_vopb: endpoint@0 {
 					reg = <0>;
 					remote-endpoint = <&vopb_out_edp>;
 				};
+
 				edp_in_vopl: endpoint@1 {
 					reg = <1>;
 					remote-endpoint = <&vopl_out_edp>;
 				};
 			};
+
+			edp_out: port@1 {
+				reg = <1>;
+			};
 		};
 	};