fnic: Adding debug IO, Abort latency counter and check condition count to fnic stats

fnic: Adding debug IO, Abort latency counter and check condition count to fnic stats

Orabug: 25638880

The IO and Abort latency counter count the time taken to complete
the IO and abort command into broad buckets. It is not intend for
performance measurement, just a debug stat.
current_max_io_time tries to keep tarck of the maximun time an IO
has taken to complete if it > 30sec, it just another debug stat.

Just a simple counter of number of check conditions encountered on
that host.

Signed-off-by: Satish Kharat <satishkh@cisco.com>
Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com>
Reviewed-by: Brian Maly <brian.maly@oracle.com>