mtip32xx: use LIST_HEAD() for list_head

There's no need to declare a list and then init it manually,
just use the LIST_HEAD() macro.
Signed-off-by: Shixin Liu <liushixin2@huawei.com>
Link: https://lore.kernel.org/r/20210329095349.4170870-2-liushixin2@huawei.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/mtip32xx/mtip32xx.c

@@ -95,8 +95,8 @@
 /* Device instance number, incremented each time a device is probed. */
 static int instance;
 
-static struct list_head online_list;
-static struct list_head removing_list;
+static LIST_HEAD(online_list);
+static LIST_HEAD(removing_list);
 static DEFINE_SPINLOCK(dev_lock);
 
 /*
@@ -4363,9 +4363,6 @@ static int __init mtip_init(void)
 
 	pr_info(MTIP_DRV_NAME " Version " MTIP_DRV_VERSION "\n");
 
-	INIT_LIST_HEAD(&online_list);
-	INIT_LIST_HEAD(&removing_list);
-
 	/* Allocate a major block device number to use with this driver. */
 	error = register_blkdev(0, MTIP_DRV_NAME);
 	if (error <= 0) {