[ALSA] ASoC export AC97 DAI

This patch exports the ASoC AC97 Digital Audio Interface as a GPL'ed
symbol.

Signed-off-by: Graeme Gregory <gg@opensource.wolfsonmicro.com>
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>

sound/soc/codecs/ac97.c

@@ -60,6 +60,7 @@ static struct snd_soc_codec_dai ac97_dai = {
 	.ops = {
 		.prepare = ac97_prepare,},
 };
+EXPORT_SYMBOL_GPL(ac97_dai);
 
 static unsigned int ac97_read(struct snd_soc_codec *codec,
 	unsigned int reg)