ARM: dts: r8a7745: add Ether support

Define the generic R8A7745 part of the Ether device node.

Based on the original (and large) patch by Dmitry Shifrin
<dmitry.shifrin@cogentembedded.com>.
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7745.dtsi

@@ -418,6 +418,18 @@
 			power-domains = <&sysc R8A7745_PD_ALWAYS_ON>;
 			status = "disabled";
 		};
+
+		ether: ethernet@ee700000 {
+			compatible = "renesas,ether-r8a7745";
+			reg = <0 0xee700000 0 0x400>;
+			interrupts = <GIC_SPI 162 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 813>;
+			power-domains = <&sysc R8A7745_PD_ALWAYS_ON>;
+			phy-mode = "rmii";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
 	};
 
 	/* External root clock */