drm/amd/display: Filter Invalid 420 Modes for HDMI TMDS

[Why]
Invalidate unsupported 420 modes on HDMI TMDS. HDMI TMDS does not
support ODM. Any modes that are horizontally wider than 4096, cannot be
supported via TMDS. So they must be filtered out and should not pass
validation.

[How]
Create fake plane for the new stream, and validate global state by going
through dml validation routine.

Tested-by: Mark Broadworth <mark.broadworth@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>