sunxi: Enable USB on Cubietruck Plus

This provides the minimal changes to the Cubietruck Plus dts to enable USB
in U-boot. It is not what will be submitted to the kernel.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

arch/arm/dts/sun8i-a83t-cubietruck-plus.dts

@@ -58,8 +58,20 @@
 	};
 };
 
+&ehci0 {
+	status = "okay";
+};
+
+&ehci1 {
+	status = "okay";
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pins_b>;
 	status = "okay";
 };
+
+&usb_otg {
+	status = "okay";
+};