ASoC: mediatek: mt8186: add AFE_DAC_CON0 to volatile register list

Mark AFE_DAC_CON0 as volatile since DSP firmware will access this
register too.
Signed-off-by: Chunxu Li <chunxu.li@mediatek.com>
Link: https://lore.kernel.org/r/20230110092623.13035-1-chunxu.li@mediatek.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/mediatek/mt8186/mt8186-afe-pcm.c

@@ -2395,6 +2395,7 @@ static bool mt8186_is_volatile_reg(struct device *dev, unsigned int reg)
 	case AUDIO_TOP_CON1:	/* reg bit controlled by CCF */
 	case AUDIO_TOP_CON2:
 	case AUDIO_TOP_CON3:
+	case AFE_DAC_CON0:
 	case AFE_DL1_CUR_MSB:
 	case AFE_DL1_CUR:
 	case AFE_DL1_END: