configs: add eth dm support for all ColdFire boards

Add dm eth config options for all involved ColdFire-based boards.

Signed-off-by: Angelo Durgehello <angelo.dureghello@timesys.com>
diff --git a/configs/M5275EVB_defconfig b/configs/M5275EVB_defconfig
index d4f6d42..72934ec 100644
--- a/configs/M5275EVB_defconfig
+++ b/configs/M5275EVB_defconfig
@@ -23,4 +23,6 @@
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_FLASH_CFI_DRIVER=y
 CONFIG_SYS_FLASH_CFI=y
+CONFIG_DM_ETH=y
+CONFIG_MCFFEC=y
 CONFIG_MII=y