ARM: dts: at91: sam9x60-curiosity: Enable USB gadget node

Enable USB gadget usb0 node support.

Signed-off-by: Zixun LI <admin@hifiphile.com>
Reviewed-by: Eugen Hristev <eugen.hristev@linaro.org>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@kernel.org>
diff --git a/arch/arm/dts/at91-sam9x60_curiosity.dts b/arch/arm/dts/at91-sam9x60_curiosity.dts
index 7f00014..1c7f0fa 100644
--- a/arch/arm/dts/at91-sam9x60_curiosity.dts
+++ b/arch/arm/dts/at91-sam9x60_curiosity.dts
@@ -319,6 +319,10 @@
 	pinctrl-0 = <&pinctrl_sdhci1>;
 };
 
+&usb0 {
+	status = "okay";
+};
+
 &usb1 {
 	num-ports = <3>;
 	atmel,vbus-gpio = <0