osmux: Introduce mgcp_conn_rtp_is_osmux() helper

This is going to be useful to know if a conn is to use Osmux without
looking at implementation details. Currently we have some duplicated
information (type, osmux.state, etc.) which we may want to refactor
later. This will allow changing implementation details without caring
much about rest of code.

Change-Id: Ib5a239fdbc319bcb16317f5e959d9a724b7a444a
1 file changed