soc: mediatek: mtk-mutex: Use module_platform_driver() macro

Replace open-coded init/exit calls with the module_platform_driver()
macro being equivalent.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20230222094253.23678-8-angelogioacchino.delregno@collabora.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

Author: AngeloGioacchino Del Regno

drivers/soc/mediatek/mtk-mutex.c

@@ -1067,19 +1067,7 @@ static struct platform_driver mtk_mutex_driver = {
 		.of_match_table = mutex_driver_dt_match,
 	},
 };
-
-static int __init mtk_mutex_init(void)
-{
-	return platform_driver_register(&mtk_mutex_driver);
-}
-
-static void __exit mtk_mutex_exit(void)
-{
-	platform_driver_unregister(&mtk_mutex_driver);
-}
-
-module_init(mtk_mutex_init);
-module_exit(mtk_mutex_exit);
+module_platform_driver(mtk_mutex_driver);
 
 MODULE_AUTHOR("Yongqiang Niu <yongqiang.niu@mediatek.com>");
 MODULE_DESCRIPTION("MediaTek SoC MUTEX driver");