mx28evk: Add USB Ethernet support

Add USB Ethernet support.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: Marek Vasut <marex@denx.de>

include/configs/mx28evk.h

@@ -184,6 +184,9 @@
 #define	CONFIG_EHCI_MXS_PORT 1
 #define	CONFIG_EHCI_IS_TDI
 #define	CONFIG_USB_STORAGE
+#define	CONFIG_USB_HOST_ETHER
+#define	CONFIG_USB_ETHER_ASIX
+#define	CONFIG_USB_ETHER_SMSC95XX
 #endif
 
 /* I2C */