ASoC: simple-card: tidyup convert_rate/channel method

Current simple-card is handling "convert_rate/channel"
by many ways. But, it is not useful and readable.
We want to do is that allow having it everywere.
This patch support it.
It will be overwrote if lower node has it.

sound {
	simple-audio-card,convert_channels = <xxx>; // initial

	simple-audio-card,dai-link {
		convert_channels = <xxx>; // overwrite
		cpu {
			convert_channels = <xxx>; // overwrite
		};
		codec {
			convert_channels = <xxx>; // overwrite
		};
	};
};

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

sound/soc/generic/simple-card.c

@@ -30,7 +30,6 @@ struct simple_card_data {
 	struct asoc_simple_jack mic_jack;
 	struct snd_soc_dai_link *dai_link;
 	struct asoc_simple_dai *dais;
-	struct asoc_simple_card_data adata;
 	struct snd_soc_codec_conf *codec_conf;
 };
 
@@ -163,9 +162,6 @@ static int asoc_simple_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
 
 	asoc_simple_card_convert_fixup(&dai_props->adata, params);
 
-	/* overwrite by top level adata if exist */
-	asoc_simple_card_convert_fixup(&priv->adata, params);
-
 	return 0;
 }
 
@@ -267,7 +263,9 @@ static int asoc_simple_card_dai_link_of_dpcm(struct device_node *top,
 						     "prefix");
 	}
 
+	asoc_simple_card_parse_convert(dev, top,  PREFIX, &dai_props->adata);
 	asoc_simple_card_parse_convert(dev, node, prefix, &dai_props->adata);
+	asoc_simple_card_parse_convert(dev, np,   NULL,   &dai_props->adata);
 
 	ret = asoc_simple_card_of_parse_tdm(np, dai);
 	if (ret)
@@ -460,8 +458,6 @@ static int asoc_simple_card_parse_of(struct simple_card_data *priv)
 	if (ret < 0)
 		return ret;
 
-	asoc_simple_card_parse_convert(dev, top, PREFIX, &priv->adata);
-
 	/* Single/Muti DAI link(s) & New style of DT node */
 	loop		= 1;
 	link_idx	= 0;