mx6ullevk: Enable Ethernet support

Add Ethernet support using DM_ETH.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
diff --git a/include/configs/mx6ullevk.h b/include/configs/mx6ullevk.h
index 7cce911..af335bc 100644
--- a/include/configs/mx6ullevk.h
+++ b/include/configs/mx6ullevk.h
@@ -166,4 +166,13 @@
 #define FSL_QSPI_FLASH_SIZE		SZ_32M
 #endif
 
+#ifdef CONFIG_CMD_NET
+#define CONFIG_FEC_ENET_DEV		1
+#if (CONFIG_FEC_ENET_DEV == 0)
+#define CONFIG_ETHPRIME			"eth0"
+#elif (CONFIG_FEC_ENET_DEV == 1)
+#define CONFIG_ETHPRIME			"eth1"
+#endif
+#endif
+
 #endif