ASoC: Intel: catpt: use asoc_substream_to_rtd()

Now we can use asoc_substream_to_rtd() macro,
let's use it.
Signed-off-by: Lianjie Zhang <zhanglianjie@uniontech.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20220307151939.32870-1-zhanglianjie@uniontech.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/catpt/pcm.c

@@ -74,7 +74,7 @@ static struct catpt_stream_template *catpt_topology[] = {
 static struct catpt_stream_template *
 catpt_get_stream_template(struct snd_pcm_substream *substream)
 {
-	struct snd_soc_pcm_runtime *rtm = substream->private_data;
+	struct snd_soc_pcm_runtime *rtm = asoc_substream_to_rtd(substream);
 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtm, 0);
 	enum catpt_stream_type type;
 
@@ -593,7 +593,7 @@ static int catpt_component_pcm_construct(struct snd_soc_component *component,
 static int catpt_component_open(struct snd_soc_component *component,
 				struct snd_pcm_substream *substream)
 {
-	struct snd_soc_pcm_runtime *rtm = substream->private_data;
+	struct snd_soc_pcm_runtime *rtm = asoc_substream_to_rtd(substream);
 
 	if (!rtm->dai_link->no_pcm)
 		snd_soc_set_runtime_hwparams(substream, &catpt_pcm_hardware);
@@ -604,7 +604,7 @@ static snd_pcm_uframes_t
 catpt_component_pointer(struct snd_soc_component *component,
 			struct snd_pcm_substream *substream)
 {
-	struct snd_soc_pcm_runtime *rtm = substream->private_data;
+	struct snd_soc_pcm_runtime *rtm = asoc_substream_to_rtd(substream);
 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtm, 0);
 	struct catpt_stream_runtime *stream;
 	struct catpt_dev *cdev = dev_get_drvdata(component->dev);