ASoC: Staticise AD1980 DAI

It doesn't need to be exported with multi-component.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

sound/soc/codecs/ad1980.c

@@ -133,7 +133,7 @@ static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
 	return 0;
 }
 
-struct snd_soc_dai_driver ad1980_dai = {
+static struct snd_soc_dai_driver ad1980_dai = {
 	.name = "ad1980-hifi",
 	.ac97_control = 1,
 	.playback = {