ARM: dts: imx27-phytec-phycore-som: Disable PM pins for USB OTG

USB PWR and OC pins are used as GPIOs for different purposes,
so add "disable-over-current" property for OTG node to indicate this.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>

arch/arm/boot/dts/imx27-phytec-phycore-som.dtsi

@@ -323,6 +323,7 @@ &usbotg {
 	phy_type = "ulpi";
 	fsl,usbphy = <&usbphy0>;
 	vbus-supply = <&sw3_reg>;
+	disable-over-current;
 	status = "okay";
 };