Extend ipc stream parameters sent to DSP

Merge series from Daniel Baluta <daniel.baluta@oss.nxp.com>
Daniel Baluta <daniel.baluta@nxp.com>:

From: Daniel Baluta <daniel.baluta@nxp.com>

We need a way to send extra parameters to DSP firmware. In order to do
this, we introduce ext_data array at the end of ipc_stream_params.

With this new addition we can send compress parameters.

This requires SOF ABI bump.