scsi: fnic: Adding Check Condition counter to misc fnicstats

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

Signed-off-by: Satish Kharat <satishkh@cisco.com>
Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>