memory: mtk-smi: Use platform_register_drivers

In this file, we have 2 drivers, smi-common and smi-larb.
Use platform_register_drivers.
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Link: https://lore.kernel.org/r/20210121062429.26504-2-yong.wu@mediatek.comSigned-off-by: Krzysztof Kozlowski <krzk@kernel.org>

drivers/memory/mtk-smi.c

@@ -587,26 +587,13 @@ static struct platform_driver mtk_smi_common_driver = {
 	}
 };
 
+static struct platform_driver * const smidrivers[] = {
+	&mtk_smi_common_driver,
+	&mtk_smi_larb_driver,
+};
+
 static int __init mtk_smi_init(void)
 {
-	int ret;
-
-	ret = platform_driver_register(&mtk_smi_common_driver);
-	if (ret != 0) {
-		pr_err("Failed to register SMI driver\n");
-		return ret;
-	}
-
-	ret = platform_driver_register(&mtk_smi_larb_driver);
-	if (ret != 0) {
-		pr_err("Failed to register SMI-LARB driver\n");
-		goto err_unreg_smi;
-	}
-	return ret;
-
-err_unreg_smi:
-	platform_driver_unregister(&mtk_smi_common_driver);
-	return ret;
+	return platform_register_drivers(smidrivers, ARRAY_SIZE(smidrivers));
 }
-
 module_init(mtk_smi_init);