ASoC: SOF: Intel: hda: reduce verbosity on SoundWire detection

ASoC: SOF: Intel: hda: reduce verbosity on SoundWire detection

No need to report an error when SoundWire is not detected (not present
in hardware or not exposed in ACPI). Move to dev_dbg to state that
SoundWire is skipped.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200409184416.15591-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>