dts: arm: renesas: Add ethernet support for RA6M3

Add ethernet support for RA6M3.

Signed-off-by: Ta Minh Nhat <nhat-minh.ta.yn@bp.renesas.com>

Author: Ta Minh Nhat

dts/arm/renesas/ra/ra6/r7fa6m1ad3cfp.dtsi

@@ -7,6 +7,9 @@
 #include <zephyr/dt-bindings/clock/ra_clock.h>
 #include <arm/renesas/ra/ra6/ra6-cm4-common.dtsi>
 
+/delete-node/ &eth;
+/delete-node/ &mdio;
+
 / {
 	soc {
 		sram0: memory@1ffe0000 {

dts/arm/renesas/ra/ra6/r7fa6m2ax.dtsi

@@ -8,6 +8,9 @@
 #include <zephyr/dt-bindings/clock/ra_clock.h>
 #include <zephyr/dt-bindings/pwm/ra_pwm.h>
 
+/delete-node/ &eth;
+/delete-node/ &mdio;
+
 / {
 	soc {
 		sram0: memory@1ffe0000 {

dts/arm/renesas/ra/ra6/ra6-cm4-common.dtsi

@@ -616,6 +616,22 @@
 			status = "disabled";
 		};
 
+		eth: ethernet@40064100 {
+			compatible = "renesas,ra-ethernet";
+			reg = <0x40064100 0xfc>;
+			interrupts = <51 0>;
+			local-mac-address = [00 11 22 33 44 55];
+			phy-connection-type = "rmii";
+			status = "disabled";
+		};
+
+		mdio: mdio {
+			compatible = "renesas,ra-mdio";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
+
 		flash: flash-controller@407e0000 {
 			compatible = "renesas,ra-flash-hp-controller";
 			reg = <0x407e0000 0x10000>;