USB: serial: ipw.c: use module_usb_serial_driver

This converts the ipw.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: Rusty Russell <rusty@rustcorp.com.au>
CC: Oliver Neukum <oneukum@suse.de>
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/ipw.c

@@ -333,25 +333,7 @@ static struct usb_serial_driver * const serial_drivers[] = {
 	&ipw_device, NULL
 };
 
-
-static int __init usb_ipw_init(void)
-{
-	int retval;
-
-	retval = usb_serial_register_drivers(&usb_ipw_driver, serial_drivers);
-	if (retval == 0)
-		printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
-			       DRIVER_DESC "\n");
-	return retval;
-}
-
-static void __exit usb_ipw_exit(void)
-{
-	usb_serial_deregister_drivers(&usb_ipw_driver, serial_drivers);
-}
-
-module_init(usb_ipw_init);
-module_exit(usb_ipw_exit);
+module_usb_serial_driver(usb_ipw_driver, serial_drivers);
 
 /* Module information */
 MODULE_AUTHOR(DRIVER_AUTHOR);