ASoC: codecs: Replace instances of rtd->codec with dai->codec

With CODEC to CODEC links rtd->codec does not necessarily point to the driver's
CODEC. CODEC drivers should always use dai->codec and never even look at the PCM
runtime.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/sound/soc/codecs/sta529.c b/sound/soc/codecs/sta529.c
index 40c07be..fa4b050 100644
--- a/sound/soc/codecs/sta529.c
+++ b/sound/soc/codecs/sta529.c
@@ -193,8 +193,7 @@
 		struct snd_pcm_hw_params *params,
 		struct snd_soc_dai *dai)
 {
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_codec *codec = dai->codec;
 	int pdata, play_freq_val, record_freq_val;
 	int bclk_to_fs_ratio;