scsi: qla2xxx: Fix n2n_ae flag to prevent dev_loss on PDB change

On a port db changes, this patch will set n2n_ae flag for N2N
connection when requesting for Report ID Acquition MBX, instead
of Loop Initialization or point to point asynchronous events.

Signed-off-by: Darren Trapp <darren.trapp@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>