configs: mx53evk: Remove CONFIG_HAS_ETH1

mx53evk has only one Ethernet port, so remove CONFIG_HAS_ETH1 option.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
diff --git a/include/configs/mx53evk.h b/include/configs/mx53evk.h
index 832050e..8fc415e 100644
--- a/include/configs/mx53evk.h
+++ b/include/configs/mx53evk.h
@@ -73,7 +73,6 @@
 #define CONFIG_DOS_PARTITION
 
 /* Eth Configs */
-#define CONFIG_HAS_ETH1
 #define CONFIG_MII
 
 #define CONFIG_FEC_MXC