drm/amd/display: Update SDP VSC colorimetry from DP test automation request

[Why]
Certain test equipment vendors check the SDP VSC for colorimetry against
the value from the test request during certain DP link layer tests for
YCbCr test cases.

[How]
Update SDP VSC with colorimetry from test automation request.

Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Roman Li <roman.li@amd.com>
Signed-off-by: George Shen <george.shen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>