scsi: qla2xxx: Remove session creation redundant code

Current code creates a session when a new port is
discovered, and a PLOGI/PRLI is received. There is
no need to create session when command has arrived.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>