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: Marek 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>
diff --git a/configs/m53menlo_defconfig b/configs/m53menlo_defconfig
index a65c21a..5289899 100644
--- a/configs/m53menlo_defconfig
+++ b/configs/m53menlo_defconfig
@@ -75,6 +75,9 @@
 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