scsi: fnic: correct speed display and add support for 25,40 and 100G

Setting speed based on the vinc device parameter read during
linkup. Also adding support to display 25,40 and 100G

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>