ASoC: Intel: sof_sdw: add mic:dmic and cfg-mics component strings

UCM needs to know which microphone is used (dmic or RT715-based),
let's add the information in the component string.

Note the slight change from HDAudio platforms where 'cfg-dmics' was
used. 'cfg-mics' is used here with the intent that this component
string describes either the number of PCH-attached microphones or the
number of RT715-attached ones (the assumption is that the two
configurations are mutually exclusive).
Suggested-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20210208233336.59449-5-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/sof_sdw.c

@@ -1222,6 +1222,15 @@ static int mc_probe(struct platform_device *pdev)
 	if (!card->components)
 		return -ENOMEM;
 
+	if (mach->mach_params.dmic_num) {
+		card->components = devm_kasprintf(card->dev, GFP_KERNEL,
+						  "%s mic:dmic cfg-mics:%d",
+						  card->components,
+						  mach->mach_params.dmic_num);
+		if (!card->components)
+			return -ENOMEM;
+	}
+
 	card->long_name = sdw_card_long_name;
 
 	/* Register the card */