[Header Changes]
  - Combine all interface dependencies between driver and fw into a
    single header file
  - Add FW Versioning to the dmub_cmd.h file
Signed-off-by: NAnthony Koo <Anthony.Koo@amd.com>
Acked-by: NQingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>