scsi: qedf: Add vendor identifier attribute

Link: https://lore.kernel.org/r/20210603121623.10084-3-jhasan@marvell.com


Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Javed Hasan <jhasan@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>