[ALSA] ASoC AC97 static GPL symbol fix

This patch fixes a bug whereby the GPL'ed symbol ac97_dai was being
declared as static.

Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/soc/codecs/ac97.c b/sound/soc/codecs/ac97.c
index 0cdef97..f3b3b9e 100644
--- a/sound/soc/codecs/ac97.c
+++ b/sound/soc/codecs/ac97.c
@@ -43,7 +43,7 @@
 #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 		SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
 
-static struct snd_soc_codec_dai ac97_dai = {
+struct snd_soc_codec_dai ac97_dai = {
 	.name = "AC97 HiFi",
 	.playback = {
 		.stream_name = "AC97 Playback",