ASoC: tlv320aic3x: add deemphasis switch

This patch adds missing deemphasis switch.

Signed-off-by: Jiri Prchal <jiri.prchal@aksignal.cz>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/tlv320aic3x.c

@@ -356,6 +356,9 @@ static const struct snd_kcontrol_new aic3x_snd_controls[] = {
 	*/
 	SOC_DOUBLE_R("AGC Switch", LAGC_CTRL_A, RAGC_CTRL_A, 7, 0x01, 0),
 
+	/* De-emphasis */
+	SOC_DOUBLE("De-emphasis Switch", AIC3X_CODEC_DFILT_CTRL, 2, 0, 0x01, 0),
+
 	/* Input */
 	SOC_DOUBLE_R_TLV("PGA Capture Volume", LADC_VOL, RADC_VOL,
 			 0, 119, 0, adc_tlv),