ASoC: Fix forgotten replacements of socdev->codec

The snd_soc_codec was moved into socdev->card, but this change wasn't
applied in some places.  Fixed now.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/soc/pxa/spitz.c b/sound/soc/pxa/spitz.c
index a3b9e6b..1aafd8c 100644
--- a/sound/soc/pxa/spitz.c
+++ b/sound/soc/pxa/spitz.c
@@ -109,7 +109,7 @@
 static int spitz_startup(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_codec *codec = rtd->socdev->codec;
+	struct snd_soc_codec *codec = rtd->socdev->card->codec;
 
 	/* check the jack status at stream startup */
 	spitz_ext_control(codec);