dts: arm: st: h7rs: Add ethernet node to dts

Add ethernet node with mac and mdio subnodes to dts similar to h7-family.

Signed-off-by: Thomas Decker <decker@jb-lighting.de>

Author: TD-JBL

dts/arm/st/h7rs/stm32h7rs.dtsi

@@ -847,6 +847,29 @@
 			status = "disabled";
 		};
 
+		ethernet@40028000 {
+			reg = <0x40028000 0x8000>;
+			compatible = "st,stm32-ethernet-controller";
+			clock-names = "stm-eth";
+			clocks = <&rcc STM32_CLOCK(AHB1, 15)>;
+
+			mac: ethernet {
+				compatible = "st,stm32h7-ethernet", "st,stm32-ethernet";
+				interrupts = <92 0>;
+				clock-names = "mac-clk-tx", "mac-clk-rx";
+				clocks = <&rcc STM32_CLOCK(AHB1, 16)>,
+					 <&rcc STM32_CLOCK(AHB1, 17)>;
+				status = "disabled";
+			};
+
+			mdio: mdio {
+				compatible = "st,stm32-mdio";
+				#address-cells = <1>;
+				#size-cells = <0>;
+				status = "disabled";
+			};
+		};
+
 		usbotg_fs: usb@40080000 {
 			compatible = "st,stm32-otgfs";
 			reg = <0x40080000 0x40000>;