ASoC: ad1980 - set reg_cache_default to ad1980_reg

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/ad1980.c b/sound/soc/codecs/ad1980.c
index 2b9331a..d36bd1c 100644
--- a/sound/soc/codecs/ad1980.c
+++ b/sound/soc/codecs/ad1980.c
@@ -247,6 +247,7 @@
 	.remove = 	ad1980_soc_remove,
 	.reg_cache_size = ARRAY_SIZE(ad1980_reg),
 	.reg_word_size = sizeof(u16),
+	.reg_cache_default = ad1980_reg,
 	.reg_cache_step = 2,
 	.write = ac97_write,
 	.read = ac97_read,