ARM64: dts: meson: accept MAC addr from u-boot environment

Extend configuring the MAC address from u-boot to all meson boards.

I didn't test this changeset but having checked libretech's u-boot
tree I believe it should just work.
Signed-off-by: NJorge Ramirez-Ortiz <jramirez@baylibre.com>
Signed-off-by: NKevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-gx-p23x-q20x.dtsi

@@ -48,6 +48,7 @@
 / {
 	aliases {
 		serial0 = &uart_AO;
+		ethernet0 = &ethmac;
 	};
 
 	chosen {

arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts

@@ -52,6 +52,7 @@
 
 	aliases {
 		serial0 = &uart_AO;
+		ethernet0 = &ethmac;
 	};
 
 	chosen {

arch/arm64/boot/dts/amlogic/meson-gxbb-nexbox-a95x.dts

@@ -54,6 +54,7 @@
 
 	aliases {
 		serial0 = &uart_AO;
+		ethernet0 = &ethmac;
 	};
 
 	chosen {

arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts

@@ -53,6 +53,7 @@
 
 	aliases {
 		serial0 = &uart_AO;
+		ethernet0 = &ethmac;
 	};
 
 	chosen {

arch/arm64/boot/dts/amlogic/meson-gxbb-p20x.dtsi

@@ -47,6 +47,7 @@
 / {
 	aliases {
 		serial0 = &uart_AO;
+		ethernet0 = &ethmac;
 	};
 
 	chosen {

arch/arm64/boot/dts/amlogic/meson-gxbb-vega-s95.dtsi

@@ -47,6 +47,7 @@
 
 	aliases {
 		serial0 = &uart_AO;
+		ethernet0 = &ethmac;
 	};
 
 	chosen {

arch/arm64/boot/dts/amlogic/meson-gxl-s905x-hwacom-amazetv.dts

@@ -16,6 +16,7 @@
 
 	aliases {
 		serial0 = &uart_AO;
+		ethernet0 = &ethmac;
 	};
 
 	chosen {

arch/arm64/boot/dts/amlogic/meson-gxl-s905x-khadas-vim.dts

@@ -29,6 +29,7 @@
 
 	aliases {
 		serial2 = &uart_AO_B;
+		ethernet0 = &ethmac;
 	};
 
 	gpio-keys-polled {

arch/arm64/boot/dts/amlogic/meson-gxl-s905x-nexbox-a95x.dts

@@ -52,6 +52,7 @@
 
 	aliases {
 		serial0 = &uart_AO;
+		ethernet0 = &ethmac;
 	};
 
 	chosen {

arch/arm64/boot/dts/amlogic/meson-gxl-s905x-p212.dtsi

@@ -17,6 +17,7 @@
 	aliases {
 		serial0 = &uart_AO;
 		serial1 = &uart_A;
+		ethernet0 = &ethmac;
 	};
 
 	chosen {

arch/arm64/boot/dts/amlogic/meson-gxm-nexbox-a1.dts

@@ -54,6 +54,7 @@
 
 	aliases {
 		serial0 = &uart_AO;
+		ethernet0 = &ethmac;
 	};
 
 	chosen {

arch/arm64/boot/dts/amlogic/meson-gxm-rbox-pro.dts

@@ -58,6 +58,7 @@
 
 	aliases {
 		serial0 = &uart_AO;
+		ethernet0 = &ethmac;
 	};
 
 	chosen {