ASoC: mediatek: mt8192-mt6359: use asoc_substream_to_rtd()

Uses asoc_substream_to_rtd() helper.
Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20210203032201.2882158-2-tzungbi@google.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c

@@ -39,7 +39,7 @@ struct mt8192_mt6359_priv {
 static int mt8192_rt1015_i2s_hw_params(struct snd_pcm_substream *substream,
 				       struct snd_pcm_hw_params *params)
 {
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 	struct snd_soc_card *card = rtd->card;
 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 	struct snd_soc_dai *codec_dai;
@@ -74,7 +74,7 @@ static int mt8192_rt1015_i2s_hw_params(struct snd_pcm_substream *substream,
 static int mt8192_rt5682_i2s_hw_params(struct snd_pcm_substream *substream,
 				       struct snd_pcm_hw_params *params)
 {
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 	struct snd_soc_card *card = rtd->card;
 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
@@ -362,7 +362,7 @@ static int mt8192_i2s_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
 static int
 mt8192_mt6359_rt1015_rt5682_cap1_startup(struct snd_pcm_substream *substream)
 {
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 	struct snd_soc_component *component =
 		snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME);
 	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);