ARM: dts: imx51-babbage: Add USB OTG support

Tested by pinging from the host PC to the imx51-babbage via a g_ether
connection.

Signed-off by: Dave Ebright <dave.ebright@parsons.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>

arch/arm/boot/dts/imx51-babbage.dts

@@ -602,3 +602,10 @@ &usbh1 {
 	phy_type = "ulpi";
 	status = "okay";
 };
+
+&usbotg {
+	dr_mode = "otg";
+	disable-over-current;
+	phy_type = "utmi_wide";
+	status = "okay";
+};