ARM: dts: meson: enable Ethernet controller

Add a node for the Ethernet controller to Meson DTS file and
enable it on the Geniatech ATV1200 board.

Signed-off-by: Beniamino Galvani <[e-mail]>
Signed-off-by: Carlo Caione <[e-mail]>

arch/arm/boot/dts/meson.dtsi

···
 			clocks = <&clk81>;
 			status = "disabled";
 		};
+
+		ethmac: ethernet@c9410000 {
+			compatible = "amlogic,meson6-dwmac", "snps,dwmac";
+			reg = <0xc9410000 0x10000
+			       0xc1108108 0x4>;
+			interrupts = <0 8 1>;
+			interrupt-names = "macirq";
+			clocks = <&clk81>;
+			clock-names = "stmmaceth";
+			status = "disabled";
+		};
 	};
 }; /* end of / */

arch/arm/boot/dts/meson6-atv1200.dts

···
 &uart_AO {
 	status = "okay";
 };
+
+&ethmac {
+	status = "okay";
+};