ASoC: Intel: sof_sdw_hdmi: remove codec_dai use

Use macro instead.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200409185827.16255-10-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/sof_sdw_hdmi.c

@@ -28,7 +28,7 @@ struct hdmi_pcm {
 int sof_sdw_hdmi_init(struct snd_soc_pcm_runtime *rtd)
 {
 	struct mc_private *ctx = snd_soc_card_get_drvdata(rtd->card);
-	struct snd_soc_dai *dai = rtd->codec_dai;
+	struct snd_soc_dai *dai = asoc_rtd_to_codec(rtd, 0);
 	struct hdmi_pcm *pcm;
 
 	pcm = devm_kzalloc(rtd->card->dev, sizeof(*pcm), GFP_KERNEL);