nvme-core: use lib tagset init helper for adminq

Use the block layer helper to initialize the common fields of tag_set
such as blk_mq_ops, number of h/w queues, queue depth, command size,
numa_node, timeout, BLK_MQ_F_XXX flags, driver data. This initialization
is spread all over the block drivers. This avoids the code repetation of
the inialization code of the tag set in current block drivers and any
future ones.

Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>

drivers/nvme/host/core.c

@@ -4814,16 +4814,10 @@ int nvme_alloc_admin_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
 	int ret;
 
 	memset(set, 0, sizeof(*set));
-	set->ops = ops;
-	set->queue_depth = NVME_AQ_MQ_TAG_DEPTH;
 	if (ctrl->ops->flags & NVME_F_FABRICS)
 		set->reserved_tags = NVMF_RESERVED_TAGS;
-	set->numa_node = ctrl->numa_node;
-	set->flags = flags;
-	set->cmd_size = cmd_size;
-	set->driver_data = ctrl;
-	set->nr_hw_queues = 1;
-	set->timeout = NVME_ADMIN_TIMEOUT;
+	blk_mq_init_tag_set(set, ops, 1, NVME_AQ_MQ_TAG_DEPTH, cmd_size,
+			ctrl->numa_node, NVME_ADMIN_TIMEOUT, flags, ctrl);
 	ret = blk_mq_alloc_tag_set(set);
 	if (ret)
 		return ret;