lpfc 8.3.18: Update lpfc to revision 8.3.18

This patch set updates the lpfc driver to revision 8.3.18

The patches for 8.3.18 contain:
- FC/FCoE Discovery fixes
- Add support of received ELS commands
- Add logic to detect last devloss timeout
- Adapter Shutdown and Unregistration cleanup
- Fix critical errors
- Add new WQE support
- Update lpfc driver version to 8.3.18

The bugfixes were cut against scsi-misc-2.6

-- james s