The topology parser in testbench can be re-used for
the other applications like the fuzzer. In order to
accomplish this, this commit does the following:
1. Separate the topology parser into a separate project
(tplg_parser) which implements the callbacks for parsing
all the components in topology.
2. Add support for parsing new components such as host
pcm, dai and mixer
3. Include the topology parser as an external project
in the testbench.
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>