[SANTINO][DTS] Configure USB OTG

Configured the USB OTG as per Santino schematic. This commit enables the
flashing onto eMMC via `uuu` tool.

arch/arm/dts/seco-imx6qdl-santino.dtsi

@@ -31,15 +31,35 @@
 		#address-cells = <1>;
 		#size-cells = <0>;
 
-		reg_usb_otg_vbus: regulator@0 {
+		// reg_usb_otg_vbus: regulator@0 {
+		// 	compatible = "regulator-fixed";
+		// 	reg = <0>;
+		// 	regulator-name = "usb_otg_vbus";
+		// 	regulator-min-microvolt = <5000000>;
+		// 	regulator-max-microvolt = <5000000>;
+		// 	gpio = <&gpio3 22 0>;
+		// 	enable-active-high;
+		// 	vin-supply = <&swbst_reg>;
+		// };
+
+
+		reg_5P0: regulator-5P0 {
 			compatible = "regulator-fixed";
-			reg = <0>;
+			regulator-name = "5P0";
+			regulator-min-microvolt = <5000000>;
+			regulator-max-microvolt = <5000000>;
+			regulator-always-on;
+		};
+
+		reg_usb_otg_vbus: regulator-usb-otg-vbus {
+			compatible = "regulator-fixed";
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_usbotgvbus1>;
 			regulator-name = "usb_otg_vbus";
 			regulator-min-microvolt = <5000000>;
 			regulator-max-microvolt = <5000000>;
+			vin-supply = <&reg_5P0>;
 			gpio = <&gpio3 22 0>;
-			enable-active-high;
-			vin-supply = <&swbst_reg>;
 		};
 
 		reg_usb_h1_vbus: regulator@1 {
@@ -166,10 +186,17 @@
 				MX6QDL_PAD_SD3_DAT5__UART2_TX_DATA	0x1b0b1
 			>;
 		};
-
+		
+		pinctrl_usbotgvbus1: usbotgvbusgrp1 {
+			fsl,pins = <
+				MX6QDL_PAD_EIM_D22__GPIO3_IO22		0x40000008
+				/* OC PAD_EIM_D21 not yet configured */
+			>;
+		};
+		
 		pinctrl_usbotg: usbotggrp {
 			fsl,pins = <
-				MX6QDL_PAD_ENET_RX_ER__USB_OTG_ID	0x17059
+				MX6QDL_PAD_GPIO_1__USB_OTG_ID	0x17059
 			>;
 		};
 
@@ -233,10 +260,6 @@
 	vbus-supply = <&reg_usb_otg_vbus>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_usbotg>;
-	disable-over-current;
-	srp-disable;
-	hnp-disable;
-	adp-disable;
 	status = "okay";
 };