USB: serial: oti6858.c: use module_usb_serial_driver

This converts the oti6858.c driver to use the module_usb_serial_driver() call
instead of having to have a module_init/module_exit function, saving a lot
of duplicated code.

CC: Johan Hovold <jhovold@gmail.com>
CC: Rusty Russell <rusty@rustcorp.com.au>
CC: Alan Stern <stern@rowland.harvard.edu>
CC: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/oti6858.c

@@ -958,20 +958,7 @@ static void oti6858_write_bulk_callback(struct urb *urb)
 	}
 }
 
-/* module description and (de)initialization */
-
-static int __init oti6858_init(void)
-{
-	return usb_serial_register_drivers(&oti6858_driver, serial_drivers);
-}
-
-static void __exit oti6858_exit(void)
-{
-	usb_serial_deregister_drivers(&oti6858_driver, serial_drivers);
-}
-
-module_init(oti6858_init);
-module_exit(oti6858_exit);
+module_usb_serial_driver(oti6858_driver, serial_drivers);
 
 MODULE_DESCRIPTION(OTI6858_DESCRIPTION);
 MODULE_AUTHOR(OTI6858_AUTHOR);