ASoC: Fix wm8995 regmap usage

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/wm8995.c b/sound/soc/codecs/wm8995.c
index 5863406..c8aada5 100644
--- a/sound/soc/codecs/wm8995.c
+++ b/sound/soc/codecs/wm8995.c
@@ -2051,6 +2051,7 @@
 	wm8995 = snd_soc_codec_get_drvdata(codec);
 	wm8995->codec = codec;
 
+	codec->control_data = wm8995->regmap;
 	ret = snd_soc_codec_set_cache_io(codec, 16, 16, SND_SOC_REGMAP);
 	if (ret < 0) {
 		dev_err(codec->dev, "Failed to set cache i/o: %d\n", ret);