ASoC: audio-graph: remove Platform support

Platform was one of mandatory component on ASoC before,
and audio-graph-card was assuming that CPU and Platform were
same driver.

But it is no longer mandatory on ASoC.
Current ASoC will just ignore if Platform and CPU were same
or doplicated component.

Of course ASoC is supporting Platform, but current
audio-graph-card doesn't support detecting it from DT.

This means current audio-graph-card operation for Platform so far
is 100% useless. This patch removes it.
We can respawn it when we need it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87sg3n3ubg.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/generic/audio-graph-card.c

@@ -223,7 +223,6 @@ static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv,
 	struct asoc_simple_dai *dai;
 	struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0);
 	struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0);
-	struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0);
 	int ret;
 
 	port	= of_get_parent(ep);
@@ -275,7 +274,6 @@ static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv,
 
 		/* card->num_links includes Codec */
 		asoc_simple_canonicalize_cpu(cpus, is_single_links);
-		asoc_simple_canonicalize_platform(platforms, cpus);
 	} else {
 		struct snd_soc_codec_conf *cconf;
 
@@ -354,7 +352,6 @@ static int graph_dai_link_of(struct asoc_simple_priv *priv,
 	struct asoc_simple_dai *codec_dai = simple_props_to_dai_codec(dai_props, 0);
 	struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0);
 	struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0);
-	struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0);
 	int ret, single_cpu = 0;
 
 	dev_dbg(dev, "link_of (%pOF)\n", cpu_ep);
@@ -405,7 +402,6 @@ static int graph_dai_link_of(struct asoc_simple_priv *priv,
 	dai_link->init = asoc_simple_dai_init;
 
 	asoc_simple_canonicalize_cpu(cpus, single_cpu);
-	asoc_simple_canonicalize_platform(platforms, cpus);
 
 	return 0;
 }
@@ -625,7 +621,6 @@ static int graph_count_noml(struct asoc_simple_priv *priv,
 
 	li->num[li->link].cpus		= 1;
 	li->num[li->link].codecs	= 1;
-	li->num[li->link].platforms	= 1;
 
 	li->link += 1; /* 1xCPU-Codec */
 
@@ -648,7 +643,6 @@ static int graph_count_dpcm(struct asoc_simple_priv *priv,
 
 	if (li->cpu) {
 		li->num[li->link].cpus		= 1;
-		li->num[li->link].platforms	= 1;
 
 		li->link++; /* 1xCPU-dummy */
 	} else {