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.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/intel/hda.c

@@ -135,10 +135,8 @@ static int hda_sdw_acpi_scan(struct snd_sof_dev *sdev)
 	hdev = sdev->pdata->hw_pdata;
 
 	ret = sdw_intel_acpi_scan(handle, &hdev->info);
-	if (ret < 0) {
-		dev_err(sdev->dev, "%s failed\n", __func__);
+	if (ret < 0)
 		return -EINVAL;
-	}
 
 	return 0;
 }
@@ -604,7 +602,7 @@ static int hda_init_caps(struct snd_sof_dev *sdev)
 	/* scan SoundWire capabilities exposed by DSDT */
 	ret = hda_sdw_acpi_scan(sdev);
 	if (ret < 0) {
-		dev_dbg(sdev->dev, "skipping SoundWire, ACPI scan error\n");
+		dev_dbg(sdev->dev, "skipping SoundWire, not detected with ACPI scan\n");
 		goto skip_soundwire;
 	}