ASoC: soc-utils: remove dummy Platform

ALSA SoC used 2 type of Platform if sound card doesn't need
Platform.

	1) use Dummy Platform as Platform component
	2) use CPU component  as Platform component

Now, ALSA SoC allows "no Platform" settings, and it will behave
same as 2) case selection. And, all sound card which doesn't need
specific Platform are now not selecting Platform any more.

This means, no sound card is using dummy Platform on ALSA SoC any
more. This patch removes unused dummy Platform.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-utils.c

@@ -262,26 +262,6 @@ static const struct snd_pcm_hardware dummy_dma_hardware = {
 	.periods_max		= 128,
 };
 
-static int dummy_dma_open(struct snd_pcm_substream *substream)
-{
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-
-	/* BE's dont need dummy params */
-	if (!rtd->dai_link->no_pcm)
-		snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware);
-
-	return 0;
-}
-
-static const struct snd_pcm_ops snd_dummy_dma_ops = {
-	.open		= dummy_dma_open,
-	.ioctl		= snd_pcm_lib_ioctl,
-};
-
-static const struct snd_soc_component_driver dummy_platform = {
-	.ops = &snd_dummy_dma_ops,
-};
-
 static const struct snd_soc_component_driver dummy_codec = {
 	.idle_bias_on		= 1,
 	.use_pmdown_time	= 1,
@@ -339,11 +319,6 @@ static int snd_soc_dummy_probe(struct platform_device *pdev)
 
 	ret = devm_snd_soc_register_component(&pdev->dev,
 					      &dummy_codec, &dummy_dai, 1);
-	if (ret < 0)
-		return ret;
-
-	ret = devm_snd_soc_register_component(&pdev->dev, &dummy_platform,
-					      NULL, 0);
 
 	return ret;
 }