ASoC: wm8961: Convert codec->hw_read to snd_soc_read

codec->hw_read is broken now, let's covert to snd_soc_read.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm8961.c

@@ -974,7 +974,9 @@ static int wm8961_probe(struct snd_soc_codec *codec)
 	}
 
 	/* This isn't volatile - readback doesn't correspond to write */
-	reg = codec->hw_read(codec, WM8961_RIGHT_INPUT_VOLUME);
+	codec->cache_bypass = 1;
+	reg = snd_soc_read(codec, WM8961_RIGHT_INPUT_VOLUME);
+	codec->cache_bypass = 0;
 	dev_info(codec->dev, "WM8961 family %d revision %c\n",
 		 (reg & WM8961_DEVICE_ID_MASK) >> WM8961_DEVICE_ID_SHIFT,
 		 ((reg & WM8961_CHIP_REV_MASK) >> WM8961_CHIP_REV_SHIFT)