ASoC: Staticise ep93xx_ac97_dai

Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Acked-by: NMika Westerberg <mika.westerberg@iki.fi>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/ep93xx/ep93xx-ac97.c

@@ -335,7 +335,7 @@ static struct snd_soc_dai_ops ep93xx_ac97_dai_ops = {
 	.trigger	= ep93xx_ac97_trigger,
 };
 
-struct snd_soc_dai_driver ep93xx_ac97_dai = {
+static struct snd_soc_dai_driver ep93xx_ac97_dai = {
 	.name		= "ep93xx-ac97",
 	.id		= 0,
 	.ac97_control	= 1,