ASoC: ad193x: Remove non-functional DAPM route controls

DAPM route controls only take effect on paths where the sink is a mixer or a
mux, furthermore the control must be a control assigned to the mixer or mux.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/ad193x.c b/sound/soc/codecs/ad193x.c
index 665af5c..c52ebd3 100644
--- a/sound/soc/codecs/ad193x.c
+++ b/sound/soc/codecs/ad193x.c
@@ -90,12 +90,12 @@
 	{ "ADC", NULL, "PLL_PWR" },
 	{ "DAC", NULL, "ADC_PWR" },
 	{ "ADC", NULL, "ADC_PWR" },
-	{ "DAC1OUT", "DAC1 Switch", "DAC" },
-	{ "DAC2OUT", "DAC2 Switch", "DAC" },
-	{ "DAC3OUT", "DAC3 Switch", "DAC" },
-	{ "DAC4OUT", "DAC4 Switch", "DAC" },
-	{ "ADC", "ADC1 Switch", "ADC1IN" },
-	{ "ADC", "ADC2 Switch", "ADC2IN" },
+	{ "DAC1OUT", NULL, "DAC" },
+	{ "DAC2OUT", NULL, "DAC" },
+	{ "DAC3OUT", NULL, "DAC" },
+	{ "DAC4OUT", NULL, "DAC" },
+	{ "ADC", NULL, "ADC1IN" },
+	{ "ADC", NULL, "ADC2IN" },
 };
 
 /*