ARM: dts: k2g: Add USB instances

Add nodes for both USB instances supported by 66AK2G.
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>

arch/arm/boot/dts/keystone-k2g.dtsi

@@ -427,5 +427,61 @@ mcasp2: mcasp@02344000 {
 			clock-names = "fck";
 			status = "disabled";
 		};
+	
+		usb0_phy: usb-phy@0 {
+			compatible = "usb-nop-xceiv";
+			status = "disabled";
+		};
+
+		keystone_usb0: keystone-dwc3@2680000 {
+			compatible = "ti,keystone-dwc3";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			reg = <0x2680000 0x10000>;
+			interrupts = <GIC_SPI 128 IRQ_TYPE_EDGE_RISING>;
+			ranges;
+			dma-coherent;
+			dma-ranges;
+			status = "disabled";
+			power-domains = <&k2g_pds 0x0016>;
+
+			usb0: usb@2690000 {
+				compatible = "snps,dwc3";
+				reg = <0x2690000 0x10000>;
+				interrupts = <GIC_SPI 128 IRQ_TYPE_EDGE_RISING>;
+				maximum-speed = "high-speed";
+				dr_mode = "otg";
+				usb-phy = <&usb0_phy>;
+				status = "disabled";
+			};
+		};
+
+		usb1_phy: usb-phy@1 {
+			compatible = "usb-nop-xceiv";
+			status = "disabled";
+		};
+
+		keystone_usb1: keystone-dwc3@2580000 {
+			compatible = "ti,keystone-dwc3";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			reg = <0x2580000 0x10000>;
+			interrupts = <GIC_SPI 144 IRQ_TYPE_EDGE_RISING>;
+			ranges;
+			dma-coherent;
+			dma-ranges;
+			status = "disabled";
+			power-domains = <&k2g_pds 0x0017>;
+
+			usb1: usb@2590000 {
+				compatible = "snps,dwc3";
+				reg = <0x2590000 0x10000>;
+				interrupts = <GIC_SPI 144 IRQ_TYPE_EDGE_RISING>;
+				maximum-speed = "high-speed";
+				dr_mode = "otg";
+				usb-phy = <&usb1_phy>;
+				status = "disabled";
+			};
+		};
 	};
 };