[SCSI] qla2xxx: fix lock imbalance

Stanse found that one error path in qla24xx_bsg_timeout omits to
unlock ha->hardware_lock. Fix that.

Signed-off-by: Jiri Slaby <[e-mail]>
Acked-by: Giridhar Malavali <[e-mail]>
Signed-off-by: James Bottomley <[e-mail]>

drivers/scsi/qla2xxx/qla_attr.c

···
 	return 0;
 
 done:
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
 	if (bsg_job->request->msgcode == FC_BSG_HST_CT)
 		kfree(sp->fcport);
 	kfree(sp->ctx);