drm/amd/display: Don't enable ODM + MPO

[Description]
Driver doesn't support ODM + MPO

Reviewed-by: Dillon Varone <Dillon.Varone@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com>
Tested-by: Mark Broadworth <mark.broadworth@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>