ASoC: omap-abe-twl6040: Use "ti,jack-detection" DT property as boolean

Handle the jack detection inforamtion as bool from devicetree.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

Documentation/devicetree/bindings/sound/omap-abe-twl6040.txt

@@ -12,7 +12,7 @@ Required properties:
 
 Optional properties:
 - ti,dmic: phandle for the OMAP dmic node if the machine have it connected
-- ti,jack_detection: Need to be set to <1> if the board capable to detect jack
+- ti,jack_detection: Need to be present if the board capable to detect jack
   insertion, removal.
 
 Available audio endpoints for the audio-routing table:
@@ -59,7 +59,7 @@ sound {
 	compatible = "ti,abe-twl6040";
 	ti,model = "SDP4430";
 
-	ti,jack-detection = <1>;
+	ti,jack-detection;
 	ti,mclk-freq = <38400000>;
 
 	ti,mcpdm = <&mcpdm>;

sound/soc/omap/omap-abe-twl6040.c

@@ -331,8 +331,8 @@ static __devinit int omap_abe_probe(struct platform_device *pdev)
 			num_links = 1;
 		}
 
-		of_property_read_u32(node, "ti,jack-detection",
-				     &priv->jack_detection);
+		priv->jack_detection = of_property_read_bool(node,
+							   "ti,jack-detection");
 		of_property_read_u32(node, "ti,mclk-freq",
 				     &priv->mclk_freq);
 		if (!priv->mclk_freq) {