ARM: dts: imx6sx-udoo-neo: add bluetooth config to uart3

This updates the WL1831 bluetooth to use the serial serdev driver
interface.
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6sx-udoo-neo-extended.dts

@@ -20,3 +20,7 @@ memory@80000000 {
 &i2c4 { /* Onboard Motion sensors */
 	status = "okay";
 };
+
+&uart3 { /* Bluetooth */
+	status = "okay";
+};

arch/arm/boot/dts/imx6sx-udoo-neo-full.dts

@@ -35,3 +35,7 @@ ethphy1: ethernet-phy@0 {
 &i2c4 { /* Onboard Motion sensors */
 	status = "okay";
 };
+
+&uart3 { /* Bluetooth */
+	status = "okay";
+};

arch/arm/boot/dts/imx6sx-udoo-neo.dtsi

@@ -70,18 +70,6 @@ reg_wlan: regulator-wlan {
 		startup-delay-us = <70000>;
 		enable-active-high;
 	};
-
-	reg_bt: regulator-bt {
-		compatible = "regulator-fixed";
-		pinctrl-names = "default";
-		pinctrl-0 = <&pinctrl_bt_reg>;
-		enable-active-high;
-		gpio = <&gpio2 17 GPIO_ACTIVE_HIGH>;
-		regulator-name = "bt_reg";
-		regulator-min-microvolt = <1800000>;
-		regulator-max-microvolt = <1800000>;
-		regulator-always-on;
-	};
 };
 
 &fec1 {
@@ -343,11 +331,19 @@ &uart2 {
 	status = "disabled";
 };
 
-&uart3 { /* Bluetooth */
+&uart3 { /* Bluetooth - only on Extended/Full versions */
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_uart3>;
 	uart-has-rtscts;
-	status = "okay";
+	status = "disabled";
+
+	bluetooth {
+		compatible = "ti,wl1831-st";
+		enable-gpios = <&gpio2 17 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_bt_reg>;
+		max-speed = <921600>;
+	};
 };
 
 /* Arduino serial */