ARM: dts: imx7d-sdb: Pass the Ethernet aliases

Describe the Ethernet aliases so that the second MAC address
can be retrieved from the bootloader.
Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/nxp/imx/imx7d-sdb.dts

@@ -10,6 +10,11 @@ / {
 	model = "Freescale i.MX7 SabreSD Board";
 	compatible = "fsl,imx7d-sdb", "fsl,imx7d";
 
+	aliases {
+		ethernet0 = &fec1;
+		ethernet1 = &fec2;
+	};
+
 	chosen {
 		stdout-path = &uart1;
 	};