ASoC: rt5660: enable MCLK detection

There is a power saving mechanism in rt5660. It will turn off some
unused power when MCLK is not present. We call that "MCLK detection"
and it should be enabled by default.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/rt5660.c b/sound/soc/codecs/rt5660.c
index 9f0933c..76cf76a 100644
--- a/sound/soc/codecs/rt5660.c
+++ b/sound/soc/codecs/rt5660.c
@@ -1311,6 +1311,10 @@ static int rt5660_i2c_probe(struct i2c_client *i2c,
 	if (ret != 0)
 		dev_warn(&i2c->dev, "Failed to apply regmap patch: %d\n", ret);
 
+	regmap_update_bits(rt5660->regmap, RT5660_GEN_CTRL1,
+		RT5660_AUTO_DIS_AMP | RT5660_MCLK_DET | RT5660_POW_CLKDET,
+		RT5660_AUTO_DIS_AMP | RT5660_MCLK_DET | RT5660_POW_CLKDET);
+
 	if (rt5660->pdata.dmic1_data_pin) {
 		regmap_update_bits(rt5660->regmap, RT5660_GPIO_CTRL1,
 			RT5660_GP1_PIN_MASK, RT5660_GP1_PIN_DMIC1_SCL);