Reconnect on RDMA device reset

[Steve Wise]

> 
> In my original email, I pointed out that I didn't know how the NVMe over
> Fabrics was doing addressing.  If it were like SRP, then it wouldn't
> work because the device GUID is part of the addressing scheme, so a new
> device wouldn't automatically show as matching that address.  If,
> however, you use IP like iSER, then yes, I agree fully you can just test
> the ability to route over the new device using the IP address and
> restore if it works.

NVME-oF/rdma uses the rdma_cm with ip addresses, ip ports, etc...