[PATCH 2/7] nvme/fc: Fix admin queue depth setup

[Sagi Grimberg]

> The NVME_FC_AQ_BLKMQ_DEPTH is one less than what we actually want the
> admin queue's depth to be since it subtracts the AEN entry.
> 
> We also need to subtract 1 from the blk-mq depth to always leave an
> empty queue entry, and to not collide command id with the AEN request.
> 
> Signed-off-by: Keith Busch <keith.busch at intel.com>

nvme-loop needs the same patch.