USB: serial: qcserial.c: use module_usb_serial_driver

This converts the qcserial.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: Steven Hardy <shardy@redhat.com>
CC: Thomas Tuttle <ttuttle@chromium.org>
CC: Paul Gortmaker <paul.gortmaker@windriver.com>
CC: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/qcserial.c

@@ -285,18 +285,7 @@ static struct usb_serial_driver * const serial_drivers[] = {
 	&qcdevice, NULL
 };
 
-static int __init qcinit(void)
-{
-	return usb_serial_register_drivers(&qcdriver, serial_drivers);
-}
-
-static void __exit qcexit(void)
-{
-	usb_serial_deregister_drivers(&qcdriver, serial_drivers);
-}
-
-module_init(qcinit);
-module_exit(qcexit);
+module_usb_serial_driver(qcdriver, serial_drivers);
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);