ASoC: Intel: Skylake: Update the rtd query

sound card rtd was an array and was updated to a list so update
the driver to use a list
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/skl_nau88l25_ssm4567.c

@@ -35,12 +35,10 @@ static struct snd_soc_card skylake_audio_card;
 
 static inline struct snd_soc_dai *skl_get_codec_dai(struct snd_soc_card *card)
 {
-	int i;
+	struct snd_soc_pcm_runtime *rtd;
 
-	for (i = 0; i < card->num_rtd; i++) {
-		struct snd_soc_pcm_runtime *rtd;
+	list_for_each_entry(rtd, &card->rtd_list, list) {
 
-		rtd = card->rtd + i;
 		if (!strncmp(rtd->codec_dai->name, SKL_NUVOTON_CODEC_DAI,
 			     strlen(SKL_NUVOTON_CODEC_DAI)))
 			return rtd->codec_dai;