n64cart: convert to blk_alloc_disk

Convert the n64cart driver to use the blk_alloc_disk helper to simplify
gendisk and request_queue allocation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20210521055116.1053587-22-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/n64cart.c

@@ -132,14 +132,10 @@ static int __init n64cart_probe(struct platform_device *pdev)
 	if (!reg_base)
 		return -EINVAL;
 
-	disk = alloc_disk(0);
+	disk = blk_alloc_disk(NUMA_NO_NODE);
 	if (!disk)
 		return -ENOMEM;
 
-	disk->queue = blk_alloc_queue(NUMA_NO_NODE);
-	if (!disk->queue)
-		return -ENOMEM;
-
 	disk->first_minor = 0;
 	disk->flags = GENHD_FL_NO_PART_SCAN;
 	disk->fops = &n64cart_fops;