ARM: dts: imx6qdl-gw5910: add support for bcm4330-bt

The Sterling-LWB has a BCM4330 which has a UART based bluetooth
HCI. Add support for binding to the bcm_hci driver to take care
of handling the shutdown gpio and loading firmware.

Because the shutdown gpio is more of an enable than a regulator
go ahead and replace the regulator with a shutdown-gpio.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-gw5910.dtsi

@@ -83,19 +83,6 @@ reg_wl: regulator-wl {
 		regulator-max-microvolt = <3300000>;
 		regulator-always-on;
 	};
-
-	reg_bt: regulator-bt {
-		pinctrl-names = "default";
-		pinctrl-0 = <&pinctrl_reg_bt>;
-		compatible = "regulator-fixed";
-		regulator-name = "bt";
-		gpio = <&gpio1 2 GPIO_ACTIVE_HIGH>;
-		startup-delay-us = <100>;
-		enable-active-high;
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
-		regulator-always-on;
-	};
 };
 
 
@@ -231,9 +218,14 @@ &uart3 {
 /* Sterling-LWB Bluetooth */
 &uart4 {
 	pinctrl-names = "default";
-	pinctrl-0 = <&pinctrl_uart4>;
+	pinctrl-0 = <&pinctrl_uart4>,<&pinctrl_bten>;
 	uart-has-rtscts;
 	status = "okay";
+
+	bluetooth {
+		compatible = "brcm,bcm4330-bt";
+		shutdown-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
+	};
 };
 
 /* GPS */
@@ -288,6 +280,12 @@ MX6QDL_PAD_GPIO_18__GPIO7_IO13		0x1b0b1
 		>;
 	};
 
+	pinctrl_bten: btengrp {
+		fsl,pins = <
+			MX6QDL_PAD_GPIO_2__GPIO1_IO02		0x1b0b1
+		>;
+	};
+
 	pinctrl_ecspi3: escpi3grp {
 		fsl,pins = <
 			MX6QDL_PAD_DISP0_DAT0__ECSPI3_SCLK	0x100b1
@@ -393,12 +391,6 @@ MX6QDL_PAD_SD1_DAT1__PWM3_OUT		0x1b0b1
 		>;
 	};
 
-	pinctrl_reg_bt: regbtgrp {
-		fsl,pins = <
-			MX6QDL_PAD_GPIO_2__GPIO1_IO02		0x1b0b1
-		>;
-	};
-
 	pinctrl_reg_wl: regwlgrp {
 		fsl,pins = <
 			MX6QDL_PAD_GPIO_5__GPIO1_IO05		0x1b0b1