phylib: Enable SMSC LAN87xx PHY support

LAN8720 PHY is used on Freescale C2X0QDS board.

Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

include/config_phylib_all_drivers.h

@@ -23,6 +23,7 @@
 #define CONFIG_PHY_NATSEMI
 #define CONFIG_PHY_LXT
 #define CONFIG_PHY_ATHEROS
+#define CONFIG_PHY_SMSC
 
 #ifdef CONFIG_PHYLIB_10G
 #define CONFIG_PHY_TERANETICS