ARM: dts: aspeed: Add USB2.0 device controller node

Add USB2.0 device controller(udc) node to device tree
for AST2600.
Signed-off-by: NNeal Liu <neal_liu@aspeedtech.com>
Link: https://lore.kernel.org/r/20220518062043.1075360-3-neal_liu@aspeedtech.comSigned-off-by: NJoel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed-g6.dtsi

@@ -303,6 +303,16 @@
 			status = "disabled";
 		};
 
+		udc: usb@1e6a2000 {
+			compatible = "aspeed,ast2600-udc";
+			reg = <0x1e6a2000 0x300>;
+			interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&syscon ASPEED_CLK_GATE_USBPORT2CLK>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_usb2bd_default>;
+			status = "disabled";
+		};
+
 		apb {
 			compatible = "simple-bus";
 			#address-cells = <1>;