USB: convert drivers/bluetooth/* to use module_usb_driver()

This converts the drivers in drivers/bluetooth/* to use the
module_usb_driver() macro which makes the code smaller and a bit
simpler.

Added bonus is that it removes some unneeded kernel log messages about
drivers loading and/or unloading.

Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: "Gustavo F. Padovan" <padovan@profusion.mobi>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/bluetooth/bpa10x.c b/drivers/bluetooth/bpa10x.c
index 751b338..6283160 100644
--- a/drivers/bluetooth/bpa10x.c
+++ b/drivers/bluetooth/bpa10x.c
@@ -521,20 +521,7 @@
 	.id_table	= bpa10x_table,
 };
 
-static int __init bpa10x_init(void)
-{
-	BT_INFO("Digianswer Bluetooth USB driver ver %s", VERSION);
-
-	return usb_register(&bpa10x_driver);
-}
-
-static void __exit bpa10x_exit(void)
-{
-	usb_deregister(&bpa10x_driver);
-}
-
-module_init(bpa10x_init);
-module_exit(bpa10x_exit);
+module_usb_driver(bpa10x_driver);
 
 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);