This version brings along following fixes:

- Revert patches that caused regressions associated with audio and an
  old change that checks the DCN version.
- Refactor DDC and HDP.
- Move DPIA and DPCD logic to new files.
- Updates to DMUB.
- Optimization and bug fixes for SUBVP/DRR.
- Drop legacy code.
Tested-by: Daniel Wheeler <Daniel.Wheeler@amd.com>
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Aric Cyr <aric.cyr@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>