ARM: dts: imx6q-ba16: add USB OTG VBUS enable GPIO

Add VBUS regulator GPIO information, so that USB OTG port can
also be used in host mode.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6q-ba16.dtsi

@@ -124,6 +124,9 @@ reg_usb_otg_vbus: regulator-usbotgvbus {
 		regulator-name = "usb_otg_vbus";
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
+		pinctrl-0 = <&pinctrl_usbotg_vbus>;
+		gpio = <&gpio4 15 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
 	};
 };
 
@@ -575,6 +578,12 @@ MX6QDL_PAD_ENET_RX_ER__USB_OTG_ID 0x17059
 		>;
 	};
 
+	pinctrl_usbotg_vbus: usbotgvbusgrp {
+		fsl,pins = <
+			MX6QDL_PAD_KEY_ROW4__GPIO4_IO15 0x000b0
+		>;
+	};
+
 	pinctrl_usdhc2: usdhc2grp {
 		fsl,pins = <
 			MX6QDL_PAD_SD2_CMD__SD2_CMD	0x17059