ASoC: SOF: don't check the existence of dummy topology

ASoC: SOF: don't check the existence of dummy topology

Monolithic topology is not needed if function topology is used. Instead
of creating a dummy topology in the file system, we can skip the
existence check in the kernel.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Simon Trimmer <simont@opensource.cirrus.com>
Link: https://patch.msgid.link/20251009094023.3474895-8-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>