drm/amd/pm: Add PMFW headers for SMU 13.0.6

Initial version of PMFW interface and message
headers for SMU 13.0.6 support.

v2: squash in location fixes (Alex)
v3: squash in updates (Alex)

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>