ASoC: SOF: ipc4: Add support for split firmware releases

ASoC: SOF: ipc4: Add support for split firmware releases

A split SOF release consists of a base firmware and two libraries:
<fw_filename>-openmodules.ri for processing (audio) modules
<fw_filename>-debug.ri for debug and developer modules

To handle this new release model add infrastructure to try to load the two
library after boot optionally.

This approach will allow flexibility on handling platforms in sof-bin with
single or split configuration:
single release: base firmware only
split release: base firmware + openmodules + debug

The files for the split firmware are located at the firmware directory.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://patch.msgid.link/20250206085237.19214-1-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>