ch9200: Convert to use module_usb_driver

Converts the ch9200 driver to use the module_usb_driver() macro which
makes the code smaller and a bit simpler.
Signed-off-by: NTobias Klauser <tklauser@distanz.ch>
Acked-by: NMatthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/usb/ch9200.c

@@ -426,18 +426,7 @@ static struct usb_driver ch9200_driver = {
 	.resume = usbnet_resume,
 };
 
-static int __init ch9200_init(void)
-{
-	return usb_register(&ch9200_driver);
-}
-
-static void __exit ch9200_exit(void)
-{
-	usb_deregister(&ch9200_driver);
-}
-
-module_init(ch9200_init);
-module_exit(ch9200_exit);
+module_usb_driver(ch9200_driver);
 
 MODULE_DESCRIPTION("QinHeng CH9200 USB Network device");
 MODULE_LICENSE("GPL");