arm64: dts: exynos: add OF graph between MHL and USB connector

OF graph describes MHL data lanes between MHL and respective USB
connector.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi

@@ -817,9 +817,22 @@ sii8620@39 {
 		clocks = <&pmu_system_controller 0>;
 		clock-names = "xtal";
 
-		port {
-			mhl_to_hdmi: endpoint {
-				remote-endpoint = <&hdmi_to_mhl>;
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				mhl_to_hdmi: endpoint {
+					remote-endpoint = <&hdmi_to_mhl>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+				mhl_to_musb_con: endpoint {
+					remote-endpoint = <&musb_con_to_mhl>;
+				};
 			};
 		};
 	};
@@ -842,6 +855,18 @@ musb_con: musb_connector {
 					     "usb-b-connector";
 				label = "micro-USB";
 				type = "micro";
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@3 {
+						reg = <3>;
+						musb_con_to_mhl: endpoint {
+							remote-endpoint = <&mhl_to_musb_con>;
+						};
+					};
+				};
 			};
 		};