mx6ull_14x14_evk_plugin: Convert to DM_ETH

Convert to DM_ETH to avoid board removal from the project.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
diff --git a/configs/mx6ull_14x14_evk_plugin_defconfig b/configs/mx6ull_14x14_evk_plugin_defconfig
index 2811d86..e6c31e6 100644
--- a/configs/mx6ull_14x14_evk_plugin_defconfig
+++ b/configs/mx6ull_14x14_evk_plugin_defconfig
@@ -41,6 +41,12 @@
 CONFIG_SF_DEFAULT_MODE=0
 CONFIG_SF_DEFAULT_SPEED=40000000
 CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_PHYLIB=y
+CONFIG_PHY_MICREL=y
+CONFIG_PHY_MICREL_KSZ8XXX=y
+CONFIG_DM_ETH=y
+CONFIG_FEC_MXC=y
+CONFIG_MII=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_IMX6=y
 CONFIG_DM_REGULATOR=y