ARM: dts: samsung: exynos4412-midas: add USB connector and USB OTG

Add full description of USB-MUIC (MAX77693 MUIC) and MUIC-MHL
connections, along with proper USB connector and OTG mode for DWC2 USB
controller.

This fixes dtc W=1 warnings:

  Warning (graph_child_address): /i2c-mhl/hdmi-bridge@39/ports: graph node has single child node 'port@0', #address-cells/#size-cells are not necessary

Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: replicant@osuosl.org
Cc: phone-devel@vger.kernel.org
Cc: ~postmarketos/upstreaming@lists.sr.ht
Cc: Martin Jücker <martin.juecker@gmail.com>
Cc: Henrik Grimler <henrik@grimler.se>
Cc: Artur Weber <aweber.kernel@gmail.com>
Tested-by: Henrik Grimler <henrik@grimler.se>
Link: https://lore.kernel.org/r/20230723142417.97734-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

arch/arm/boot/dts/samsung/exynos4412-midas.dtsi

@@ -182,6 +182,38 @@
 			pinctrl-0 = <&max77693_irq>;
 			reg = <0x66>;
 
+			muic {
+				compatible = "maxim,max77693-muic";
+
+				connector {
+					compatible = "samsung,usb-connector-11pin",
+						     "usb-b-connector";
+					label = "micro-USB";
+					type = "micro";
+
+					ports {
+						#address-cells = <1>;
+						#size-cells = <0>;
+
+						port@0 {
+							reg = <0>;
+
+							muic_to_usb: endpoint {
+								remote-endpoint = <&usb_to_muic>;
+							};
+						};
+
+						port@3 {
+							reg = <3>;
+
+							muic_to_mhl: endpoint {
+								remote-endpoint = <&mhl_to_muic>;
+							};
+						};
+					};
+				};
+			};
+
 			regulators {
 				esafeout1_reg: ESAFEOUT1 {
 					regulator-name = "ESAFEOUT1";
@@ -287,6 +319,14 @@
 						remote-endpoint = <&hdmi_to_mhl>;
 					};
 				};
+
+				port@1 {
+					reg = <1>;
+
+					mhl_to_muic: endpoint {
+						remote-endpoint = <&muic_to_mhl>;
+					};
+				};
 			};
 		};
 	};
@@ -545,8 +585,16 @@
 &hsotg {
 	vusb_d-supply = <&ldo15_reg>;
 	vusb_a-supply = <&ldo12_reg>;
-	dr_mode = "peripheral";
+	dr_mode = "otg";
+	role-switch-default-mode = "peripheral";
+	usb-role-switch;
 	status = "okay";
+
+	port {
+		usb_to_muic: endpoint {
+			remote-endpoint = <&muic_to_usb>;
+		};
+	};
 };
 
 &i2c_0 {