wandboard/dts: Fix USB OTG

 - Corrected pin assignment to use GPIO3_IO22.
 - Corrected iomux to use USB_OTG_POWER.
 - Changed USB mode from 'peripheral' to 'otg'.  USB OTG will now work in both host and client modes.

Author: joshuakurland

arch/arm/boot/dts/imx6qdl-wandboard.dtsi

@@ -56,7 +56,7 @@
 			regulator-name = "usb_otg_vbus";
 			regulator-min-microvolt = <5000000>;
 			regulator-max-microvolt = <5000000>;
-			gpio = <&gpio1 1 GPIO_ACTIVE_LOW>;
+			gpio = <&gpio3 22 0>;
 			enable-active-high;
 		};
 	};
@@ -349,7 +349,7 @@ reference manual.
 		pinctrl_hog_1: hoggrp-1 {
 			fsl,pins = <
 				MX6QDL_PAD_GPIO_0__CCM_CLKO1     	0x130b0
-				MX6QDL_PAD_EIM_D22__GPIO3_IO22		0x80000000	/* USB Power Enable */
+				MX6QDL_PAD_EIM_D22__USB_OTG_PWR		0x80000000	/* USB Power Enable */
 				MX6QDL_PAD_GPIO_2__GPIO1_IO02		0x80000000	/* USDHC1 CD */
 				MX6QDL_PAD_EIM_DA9__GPIO3_IO09		0x80000000	/* uSDHC3 CD */
 				MX6QDL_PAD_GPIO_0__CCM_CLKO1		0x000b0		/* SGTL5000 sys_mclk */
@@ -477,7 +477,7 @@ reference manual.
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_usbotg_1>;
 	disable-over-current;
-	dr_mode = "peripheral";
+	dr_mode = "otg";
 	status = "okay";
 };