arm: sun8i: nanopi-neo: Enable dwmac-sun8i

The dwmac-sun8i hardware is present on the NanoPi Neo.
It uses the internal PHY.
This patch create the needed emac node.
Signed-off-by: NCorentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/arm/boot/dts/sun8i-h3-nanopi-neo.dts

@@ -46,3 +46,10 @@
 	model = "FriendlyARM NanoPi NEO";
 	compatible = "friendlyarm,nanopi-neo", "allwinner,sun8i-h3";
 };
+
+&emac {
+	phy-handle = <&int_mii_phy>;
+	phy-mode = "mii";
+	allwinner,leds-active-low;
+	status = "okay";
+};