ASoC: SOF: topology: make process type optional

As components can be now identified with a UUID based mechanism, the
process type is no longer required. For new DSP components, process and
its component type can be set to SOF_PROCESS_NONE and SOF_COMP_NONE.
Allow this combination in topology load, modify the load time check for
process type to reflect this.

Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Curtis Malainey <curtis@malainey.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200904132744.1699575-17-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>