ARM: dts: imx6qdl-dhcom: Add USB overcurrent pin on SoM layer

Add USB overcurrent pin muxing on SoM layer. On DRC02 and PDK2 the USB
overcurrent pin isn't connected, but a USB hub on the board takes care
of the USB overcurrent instead. Therefore disable it there with the
property disable-over-current.

Signed-off-by: Christoph Niedermaier <[e-mail]>
Cc: Shawn Guo <[e-mail]>
Cc: Fabio Estevam <[e-mail]>
Cc: Marek Vasut <[e-mail]>
Cc: NXP Linux Team <[e-mail]>
Cc: [e-mail]
To: [e-mail]
Reviewed-by: Marek Vasut <[e-mail]>
Reviewed-by: Fabio Estevam <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx6qdl-dhcom-drc02.dtsi

···
 	rts-gpios = <&gpio7 13 GPIO_ACTIVE_HIGH>; /* GPIO P */
 };
 
+&usbh1 {
+	disable-over-current;
+};
+
 &usdhc2 { /* SD card */
 	status = "okay";
 };

arch/arm/boot/dts/imx6qdl-dhcom-pdk2.dtsi

···
 	status = "okay";
 };
 
+&usbh1 {
+	disable-over-current;
+};
+
 &usdhc2 { /* SD card */
 	status = "okay";
 };

arch/arm/boot/dts/imx6qdl-dhcom-som.dtsi

···
 	pinctrl_usbh1: usbh1-grp {
 		fsl,pins = <
 			MX6QDL_PAD_EIM_D31__GPIO3_IO31		0x120b0
+			MX6QDL_PAD_EIM_D30__USB_H1_OC		0x1b0b1
 		>;
 	};