ARM: dts: imx: m53menlo: Convert to DM_ETH

Convert the board to DM_ETH instead of legacy networking. This requires
a minor addition to the DT to satisfy the requirement for specifying a
PHY node. No functional change from board user perspective.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP i.MX U-Boot Team <uboot-imx@nxp.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>

arch/arm/dts/imx53-m53menlo.dts

@@ -86,8 +86,19 @@
 &fec {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_fec>;
+	phy-handle = <&ethphy0>;
 	phy-mode = "rmii";
 	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ethphy0: ethernet-phy@0 {
+			compatible = "ethernet-phy-ieee802.3-c22";
+			reg = <0>;
+		};
+	};
 };
 
 &i2c1 {

configs/m53menlo_defconfig

@@ -75,6 +75,9 @@ CONFIG_NAND_MXC=y
 CONFIG_PHYLIB=y
 CONFIG_PHY_MICREL=y
 CONFIG_PHY_MICREL_KSZ8XXX=y
+CONFIG_DM_ETH=y
+CONFIG_DM_MDIO=y
+CONFIG_DM_ETH_PHY=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_IMX5=y
 CONFIG_DM_REGULATOR=y