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/cobra5272_defconfig b/configs/cobra5272_defconfig
index 3bc76ac..1360a93 100644
--- a/configs/cobra5272_defconfig
+++ b/configs/cobra5272_defconfig
@@ -17,5 +17,7 @@
 CONFIG_ENV_ADDR=0xFFE04000
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_MTD_NOR_FLASH=y
+CONFIG_DM_ETH=y
+CONFIG_MCFFEC=y
 CONFIG_MII=y
 CONFIG_BAUDRATE=19200