ASoC: Enable ASoC register map dump for some regmap CODECs

It's still useful to be able to poke around in the register map at
runtime.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c
index be35b64..1be4eb3 100644
--- a/sound/soc/codecs/wm8962.c
+++ b/sound/soc/codecs/wm8962.c
@@ -4123,11 +4123,20 @@
 	return 0;
 }
 
+static int wm8962_soc_volatile(struct snd_soc_codec *codec,
+			       unsigned int reg)
+{
+	return true;
+}
+
+
 static struct snd_soc_codec_driver soc_codec_dev_wm8962 = {
 	.probe =	wm8962_probe,
 	.remove =	wm8962_remove,
 	.set_bias_level = wm8962_set_bias_level,
 	.set_pll = wm8962_set_fll,
+	.reg_cache_size	= WM8962_MAX_REGISTER,
+	.volatile_register = wm8962_soc_volatile,
 };
 
 static const struct regmap_config wm8962_regmap = {