net: prepare usb net drivers for addition of status as a parameter

USB is going to switch the signature of the callbacks to
void callback(struct urb *urb, int status)
This patch will ease the transition.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/usb/asix.c b/drivers/net/usb/asix.c
index de57490..e009481 100644
--- a/drivers/net/usb/asix.c
+++ b/drivers/net/usb/asix.c
@@ -246,10 +246,11 @@
 static void asix_async_cmd_callback(struct urb *urb)
 {
 	struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
+	int status = urb->status;
 
-	if (urb->status < 0)
+	if (status < 0)
 		printk(KERN_DEBUG "asix_async_cmd_callback() failed with %d",
-			urb->status);
+			status);
 
 	kfree(req);
 	usb_free_urb(urb);