[ALSA] soc - Fix delayed_work related changes on 2.6.20 kernel

Fix the changes realted to delayed_work in soc/codecs/wm8750.c.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/include/sound/soc.h b/include/sound/soc.h
index c985a11..ea836d8 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -374,6 +374,7 @@
 	struct list_head dapm_paths;
 	unsigned int dapm_state;
 	unsigned int suspend_dapm_state;
+	struct delayed_work delayed_work;
 
 	/* codec DAI's */
 	struct snd_soc_codec_dai *dai;