add SMSC LAN9x1x Network driver

This patch adds a driver for the following smsc network controllers:
LAN9115
LAN9116
LAN9117
LAN9215
LAN9216
LAN9217

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>

drivers/net/Makefile

@@ -54,6 +54,7 @@ COBJS-y += rtl8139.o
 COBJS-y += rtl8169.o
 COBJS-y += s3c4510b_eth.o
 COBJS-y += smc91111.o
+COBJS-y += smc911x.o
 COBJS-y += tigon3.o
 COBJS-y += tsec.o
 COBJS-y += tsi108_eth.o