staging: ft1000: Fix typo in ft1000_usb.c

Correct spelling typo within debug message of ft1000_usb.c
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ft1000/ft1000-usb/ft1000_usb.c

@@ -237,7 +237,7 @@ static void ft1000_disconnect(struct usb_interface *interface)
 			ft1000_destroy_dev(pft1000info->pFt1000Dev->net);
 			unregister_netdev(pft1000info->pFt1000Dev->net);
 			DEBUG
-			    ("ft1000_disconnect: network device unregisterd\n");
+			    ("ft1000_disconnect: network device unregistered\n");
 			free_netdev(pft1000info->pFt1000Dev->net);
 
 		}