ASoC: SOF: ipc4-topology: No need to unbind routes within a pipeline

ASoC: SOF: ipc4-topology: No need to unbind routes within a pipeline

The FW currently ignores unbinding routes if the source and sink widgets
belong to the same pipeline. So no need to send the IPC at all in the
first place.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20230127120031.10709-2-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>