ASoC: wm_hubs: Move CODEC stored in private data into wm_hubs

Further wm_hubs code will use this.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm8994.h

@@ -73,7 +73,6 @@ struct wm8994;
 struct wm8994_priv {
 	struct wm_hubs_data hubs;
 	struct wm8994 *wm8994;
-	struct snd_soc_codec *codec;
 	int sysclk[2];
 	int sysclk_rate[2];
 	int mclk[2];