ASoC: twl6040: Use power efficient workqueue

The accessory detect debounce work is not performance sensitive so let
the scheduler run it wherever is most efficient rather than in a per CPU
workqueue by using the system power efficient workqueue.
Signed-off-by: Mark Brown <broonie@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

sound/soc/codecs/twl6040.c

@@ -429,7 +429,8 @@ static irqreturn_t twl6040_audio_handler(int irq, void *data)
 	struct snd_soc_codec *codec = data;
 	struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec);
 
-	schedule_delayed_work(&priv->hs_jack.work, msecs_to_jiffies(200));
+	queue_delayed_work(system_power_efficient_wq,
+			   &priv->hs_jack.work, msecs_to_jiffies(200));
 
 	return IRQ_HANDLED;
 }