Input: sparcspkr - use platform_register/unregister_drivers()

These new helpers simplify implementing multi-driver modules and
properly handle failure to register one driver by unregistering all
previously registered drivers.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/sparcspkr.c

@@ -345,23 +345,19 @@ static struct platform_driver grover_beep_driver = {
 	.shutdown	= sparcspkr_shutdown,
 };
 
+static struct platform_driver * const drivers[] = {
+	&bbc_beep_driver,
+	&grover_beep_driver,
+};
+
 static int __init sparcspkr_init(void)
 {
-	int err = platform_driver_register(&bbc_beep_driver);
-
-	if (!err) {
-		err = platform_driver_register(&grover_beep_driver);
-		if (err)
-			platform_driver_unregister(&bbc_beep_driver);
-	}
-
-	return err;
+	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 }
 
 static void __exit sparcspkr_exit(void)
 {
-	platform_driver_unregister(&bbc_beep_driver);
-	platform_driver_unregister(&grover_beep_driver);
+	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 }
 
 module_init(sparcspkr_init);