scsi: fnic: minor cleanup in fnic_fcpio_itmf_cmpl_handler, removing else case

Getting rid of else case to make the flow look bit simpler.

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>