drm/amd/display: Ensure commit_streams returns the DC return code
[Description] - Ensure dc_commit_streams returns the correct return code so any failures can be handled properly in DM layer - If set timings fail and we have to remove MPO planes, do so unconditionally but make sure to mark for removal so we report the VSYNC and prevent timeout - Failure to remove MPO plane results in set timings failure due to lack of resources Reviewed-by: Aric Cyr <Aric.Cyr@amd.com> Acked-by: Stylon Wang <stylon.wang@amd.com> Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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