scsi: scsi_transport_fc: Simplify alloc_workqueue() invocations

Let alloc_workqueue() format the workqueue name instead of calling
snprintf() explicitly.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240822195944.654691-16-bvanassche@acm.org


Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>