[PATCH v6 05/10] drm/dp_mst: Make drm_dp_mst_topology_state subclassable

This is useful for drivers (which will probably be all of them soon) which need to track state that is exclusive to the topology, and not a specific connector on said topology. This includes things such as the link rate and lane count that are shared by all of the connectors on the topology.

[PATCH v6 05/10] drm/dp_mst: Make drm_dp_mst_topology_state subclassable

This is useful for drivers (which will probably be all of them soon) which need to track state that is exclusive to the topology, and not a specific connector on said topology. This includes things such as the link rate and lane count that are shared by all of the connectors on the topology.