ASoC: Optimise DSP performance for WM8994

Change the chip defaults to optimise performance of some of the DSP
functionality.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

sound/soc/codecs/wm8994.c

@@ -3082,10 +3082,11 @@ static int wm8994_set_bias_level(struct snd_soc_codec *codec,
 
 	case SND_SOC_BIAS_STANDBY:
 		if (codec->bias_level == SND_SOC_BIAS_OFF) {
-			/* Tweak DC servo configuration for improved
-			 * performance. */
+			/* Tweak DC servo and DSP configuration for
+			 * improved performance. */
 			snd_soc_write(codec, 0x102, 0x3);
 			snd_soc_write(codec, 0x56, 0x3);
+			snd_soc_write(codec, 0x817, 0);
 			snd_soc_write(codec, 0x102, 0);
 
 			/* Discharge LINEOUT1 & 2 */