ARM: dts: ox810se: Add Ethernet support

Add nodes for the embedded Synopsys DWMAC Ethernet controller.
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20220104145646.135877-4-narmstrong@baylibre.com

arch/arm/boot/dts/ox810se-wd-mbwe.dts

@@ -103,6 +103,10 @@
 	};
 };
 
+&etha {
+	status = "okay";
+};
+
 &uart1 {
 	status = "okay";
 

arch/arm/boot/dts/ox810se.dtsi

@@ -81,6 +81,24 @@
 		ranges;
 		interrupt-parent = <&intc>;
 
+		etha: ethernet@40400000 {
+			compatible = "oxsemi,ox810se-dwmac", "snps,dwmac";
+			reg = <0x40400000 0x2000>;
+			interrupts = <8>;
+			interrupt-names = "macirq";
+			mac-address = [000000000000]; /* Filled in by U-Boot */
+			phy-mode = "rgmii";
+
+			clocks = <&stdclk 6>, <&gmacclk>;
+			clock-names = "gmac", "stmmaceth";
+			resets = <&reset 6>;
+
+			/* Regmap for sys registers */
+			oxsemi,sys-ctrl = <&sys>;
+
+			status = "disabled";
+		};
+
 		apb-bridge@44000000 {
 			#address-cells = <1>;
 			#size-cells = <1>;