drm/amd/display: add check for PMFW hard min request complete

drm/amd/display: add check for PMFW hard min request complete

[Why]
When we issue hard min request to PMFW, the ack back does not
guarantee the request has been fulfilled.

[How]
Add new PMFW message to check if the hard min request has been
completed. Returned bit mask indicates which clock requests are
completed. Check PMFW version before using message

Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Samson Tam <samson.tam@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>