imx: wandboard: convert FEC support to DM_ETH

Remove CONFIG_DM_ETH conversion warning to avoid board removal.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/configs/wandboard_defconfig b/configs/wandboard_defconfig
index a8b6b41..d7eb8fd 100644
--- a/configs/wandboard_defconfig
+++ b/configs/wandboard_defconfig
@@ -57,6 +57,9 @@
 CONFIG_DM_MMC=y
 CONFIG_FSL_USDHC=y
 CONFIG_PHYLIB=y
+CONFIG_PHY_ATHEROS=y
+CONFIG_DM_ETH=y
+CONFIG_FEC_MXC=y
 CONFIG_MII=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_IMX6=y