ASoC: ab8500: Staticise non-exported ab85000_codec_dai

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/ab8500-codec.c b/sound/soc/codecs/ab8500-codec.c
index af54749..4d96090 100644
--- a/sound/soc/codecs/ab8500-codec.c
+++ b/sound/soc/codecs/ab8500-codec.c
@@ -2356,7 +2356,7 @@
 	return 0;
 }
 
-struct snd_soc_dai_driver ab8500_codec_dai[] = {
+static struct snd_soc_dai_driver ab8500_codec_dai[] = {
 	{
 		.name = "ab8500-codec-dai.0",
 		.id = 0,