lpfc 8.3.15: Update lpfc to revision 8.3.15

This patch set updates the lpfc driver to revision 8.3.15

The patches for 8.3.15 contain:
- BSG, Discovery, and Misc fixes:
- FCoE Related Fixes
- Add target queue depth throttling support
- Update driver version 8.3.15

The bugfixes were cut against scsi-misc-2.6

-- james s