ASoC: JZ4740: qi_lb60: Use the SND_SOC_DAPM_EVENT_OFF for the speakers status

Use SND_SOC_DAPM_EVENT_OFF for determining whether the speaker should be turned
on or off instead of open coding it.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/jz4740/qi_lb60.c

@@ -27,11 +27,7 @@
 static int qi_lb60_spk_event(struct snd_soc_dapm_widget *widget,
 			     struct snd_kcontrol *ctrl, int event)
 {
-	int on = 0;
-	if (event & SND_SOC_DAPM_POST_PMU)
-		on = 1;
-	else if (event & SND_SOC_DAPM_PRE_PMD)
-		on = 0;
+	int on = !SND_SOC_DAPM_EVENT_OFF(event);
 
 	gpio_set_value(QI_LB60_SND_GPIO, on);
 	gpio_set_value(QI_LB60_AMP_GPIO, on);