ASoC: wm8985 Don't directly reference the cache data structure

In preparation for conversion to regmap.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm8985.c

@@ -946,7 +946,6 @@ static int wm8985_probe(struct snd_soc_codec *codec)
 	size_t i;
 	struct wm8985_priv *wm8985;
 	int ret;
-	u16 *cache;
 
 	wm8985 = snd_soc_codec_get_drvdata(codec);
 
@@ -979,13 +978,13 @@ static int wm8985_probe(struct snd_soc_codec *codec)
 		goto err_reg_enable;
 	}
 
-	cache = codec->reg_cache;
 	/* latch volume update bits */
 	for (i = 0; i < ARRAY_SIZE(volume_update_regs); ++i)
-		cache[volume_update_regs[i]] |= 0x100;
+		snd_soc_update_bits(codec, volume_update_regs[i],
+				    0x100, 0x100);
 	/* enable BIASCUT */
-	cache[WM8985_BIAS_CTRL] |= WM8985_BIASCUT;
-	codec->cache_sync = 1;
+	snd_soc_update_bits(codec, WM8985_BIAS_CTRL, WM8985_BIASCUT,
+			    WM8985_BIASCUT);
 
 	wm8985_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 	return 0;