ARM: dts: sun8i: h3: Add ethernet0 alias to Beelink X2

[ Upstream commit cc4bddade114b696ab27c1a77cfc7040151306da ]

Because "ethernet0" alias is missing, U-Boot doesn't generate board
specific MAC address. Effect of this is random MAC address every boot
and thus new IP address is assigned to the board.

Fix this by adding alias.

Fixes: 7389172f ("ARM: dts: sun8i: h3: Enable dwmac-sun8i on the Beelink X2")
Signed-off-by: NJernej Skrabec <jernej.skrabec@siol.net>
[Maxime: Removed unneeded comment]
Signed-off-by: NMaxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>

arch/arm/boot/dts/sun8i-h3-beelink-x2.dts

@@ -53,7 +53,7 @@
 
 	aliases {
 		serial0 = &uart0;
-		/* ethernet0 is the H3 emac, defined in sun8i-h3.dtsi */
+		ethernet0 = &emac;
 		ethernet1 = &sdiowifi;
 	};