nvme-fabrics: document the poll function argument

This patch avoids that the kernel-doc tool reports a warning when
building with W=1.

Fixes: 26c6822 ("nvme-fabrics: allow nvmf_connect_io_queue to poll") # v5.0-rc1
Signed-off-by: Bart Van Assche <[email protected]>
Reviewed-by: Sagi Grimberg <[email protected]>
Reviewed-by: Chaitanya Kulkarni <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>
(cherry picked from commit a467fc5)
Orabug: 29933720

Signed-off-by: Alan Adamson <[email protected]>
Reviewed-by: John Donnelly <[email protected]>

Author: bvanassche

drivers/nvme/host/fabrics.c

@@ -430,6 +430,7 @@ EXPORT_SYMBOL_GPL(nvmf_connect_admin_queue);
  * @qid:	NVMe I/O queue number for the new I/O connection between
  *		host and target (note qid == 0 is illegal as this is
  *		the Admin queue, per NVMe standard).
+ * @poll:	Whether or not to poll for the completion of the connect cmd.
  *
  * This function issues a fabrics-protocol connection
  * of a NVMe I/O queue (via NVMe Fabrics "Connect" command)