scsi: fnic: unlock on error path in fnic_queuecommand()

Call spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags) before
returning.

Fixes: c81df08c ("scsi: fnic: Add support for multiqueue (MQ) in fnic driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/5360fa20-74bc-4c22-a78e-ea8b18c5410d@moroto.mountain


Reviewed-by: Karan Tilak Kumar <kartilak@cisco.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>