ACPI: SBS: Simplify the code using module_acpi_driver()

Using the module_acpi_driver() to simplify the code.
Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/sbs.c

@@ -711,17 +711,4 @@ static struct acpi_driver acpi_sbs_driver = {
 		},
 	.drv.pm = &acpi_sbs_pm,
 };
-
-static int __init acpi_sbs_init(void)
-{
-	return acpi_bus_register_driver(&acpi_sbs_driver);
-}
-
-static void __exit acpi_sbs_exit(void)
-{
-	acpi_bus_unregister_driver(&acpi_sbs_driver);
-	return;
-}
-
-module_init(acpi_sbs_init);
-module_exit(acpi_sbs_exit);
+module_acpi_driver(acpi_sbs_driver);