ARM: dts: exynos: Enable AX88760 USB hub on Origen board

Enable the Origen's usb phy and ohci devices in the device tree.  Also
add the "samsung,vbus-gpio" property to enable the GPX3(5) gpio pin so
the AX88760 hub is powered.
Signed-off-by: Matthew Leach <matthew@mattleach.net>
[k.kozlowski: Extend nodes by label notation instead of path]
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

arch/arm/boot/dts/exynos4412-origen.dts

@@ -83,6 +83,22 @@ &cpu0 {
 	cpu0-supply = <&buck2_reg>;
 };
 
+&exynos_usbphy {
+	status = "okay";
+};
+
+&ehci {
+	samsung,vbus-gpio = <&gpx3 5 1>;
+	status = "okay";
+
+	port@1{
+		status = "okay";
+	};
+	port@2 {
+		status = "okay";
+	};
+};
+
 &fimd {
 	pinctrl-0 = <&lcd_clk &lcd_data24 &pwm1_out>;
 	pinctrl-names = "default";