scsi: mac_esp: Use module_platform_driver to simplify the code

Use module_platform_driver() to eliminate boilerplate code.

Link: https://lore.kernel.org/r/20200914065403.3726462-1-liushixin2@huawei.comSigned-off-by: Liu Shixin <liushixin2@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mac_esp.c

@@ -439,22 +439,10 @@ static struct platform_driver esp_mac_driver = {
 		.name	= DRV_MODULE_NAME,
 	},
 };
-
-static int __init mac_esp_init(void)
-{
-	return platform_driver_register(&esp_mac_driver);
-}
-
-static void __exit mac_esp_exit(void)
-{
-	platform_driver_unregister(&esp_mac_driver);
-}
+module_platform_driver(esp_mac_driver);
 
 MODULE_DESCRIPTION("Mac ESP SCSI driver");
 MODULE_AUTHOR("Finn Thain");
 MODULE_LICENSE("GPL v2");
 MODULE_VERSION(DRV_VERSION);
 MODULE_ALIAS("platform:" DRV_MODULE_NAME);
-
-module_init(mac_esp_init);
-module_exit(mac_esp_exit);