scsi: qla2xxx: Add changes in preparation for vendor extended FDMI/RDP

This patch prepares code for implementing Vendor specific extended FDMI/RDP
commands. It also addes support for MBC_GET_PORT_DATABASE and
MBC_GET_RNID_PARAMS commands.

Link: https://lore.kernel.org/r/20200212214436.25532-7-hmadhani@marvell.com


Signed-off-by: Joe Carnuccio <joe.carnuccio@qlogic.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>