net: asix: ax88772_unbind() can be static

Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/usb/asix_devices.c

@@ -502,7 +502,7 @@ static int ax88772_bind(struct usbnet *dev, struct usb_interface *intf)
 	return 0;
 }
 
-void ax88772_unbind(struct usbnet *dev, struct usb_interface *intf)
+static void ax88772_unbind(struct usbnet *dev, struct usb_interface *intf)
 {
 	if (dev->driver_priv)
 		kfree(dev->driver_priv);