USB: staging: media: as102: convert to use module_usb_driver

The as102 driver can be converted to use module_usb_driver() which saves
a lot of code, and gets rid of an unwanted err() call at the same time.

Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Sylwester Nawrocki <snjw23@gmail.com>
Cc: Piotr Chmura <chmooreck@poczta.onet.pl>
Cc: Devin Heitmueller <dheitmueller@kernellabs.com>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/media/as102/as102_drv.c

@@ -279,40 +279,8 @@ void as102_dvb_unregister(struct as102_dev_t *as102_dev)
 	pr_info("Unregistered device %s", as102_dev->name);
 }
 
-static int __init as102_driver_init(void)
-{
-	int ret;
-
-	/* register this driver with the low level subsystem */
-	ret = usb_register(&as102_usb_driver);
-	if (ret)
-		err("usb_register failed (ret = %d)", ret);
-
-	return ret;
-}
-
-/*
- * Mandatory function : Adds a special section to the module indicating
- * where initialisation function is defined
- */
-module_init(as102_driver_init);
-
-/**
- * as102_driver_exit - as102 driver exit point
- *
- * This function is called when device has to be removed.
- */
-static void __exit as102_driver_exit(void)
-{
-	/* deregister this driver with the low level bus subsystem */
-	usb_deregister(&as102_usb_driver);
-}
+module_usb_driver(as102_usb_driver);
 
-/*
- * required function for unload: Adds a special section to the module
- * indicating where unload function is defined
- */
-module_exit(as102_driver_exit);
 /* modinfo details */
 MODULE_DESCRIPTION(DRIVER_FULL_NAME);
 MODULE_LICENSE("GPL");