smsc75xx: SMSC LAN75xx USB gigabit ethernet adapter driver

This patch adds a driver for SMSC's LAN7500 family of USB 2.0
to gigabit ethernet adapters.  It's loosely based on the smsc95xx
driver but the device registers for LAN7500 are completely different.

Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig
index 32d9356..ba56ce4 100644
--- a/drivers/net/usb/Kconfig
+++ b/drivers/net/usb/Kconfig
@@ -204,6 +204,14 @@
 	  This option adds support for Davicom DM9601 based USB 1.1
 	  10/100 Ethernet adapters.
 
+config USB_NET_SMSC75XX
+	tristate "SMSC LAN75XX based USB 2.0 gigabit ethernet devices"
+	depends on USB_USBNET
+	select CRC32
+	help
+	  This option adds support for SMSC LAN95XX based USB 2.0
+	  Gigabit Ethernet adapters.
+
 config USB_NET_SMSC95XX
 	tristate "SMSC LAN95XX based USB 2.0 10/100 ethernet devices"
 	depends on USB_USBNET