scsi: qla2xxx: Fix for FC-NVMe discovery for NPIV port

This patch fixes NVMe discovery by setting SKIP_PRLI flag, so that PRLI is
driven by driver and is retried when the NPIV port is detected to have NVMe
capability.

Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>