ASoC: SOF: ipc4-topology: set config_length based on device_count

ASoC: SOF: ipc4-topology: set config_length based on device_count

Set ipc4_copier->data.gtw_cfg.config_length dynamically based on
blob->alh_cfg.device_count to align with the other OS.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://msgid.link/r/20240213123007.29956-1-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>