JDI bu21150 touch AFE controller

Required properties:

 - compatible			: should be "jdi,bu21150"
 - reg					: SPI address of the device
 - interrupt-parent		: parent of interrupt
 - interrupts			: interrupt of touch AFE
 - irq-gpio 			: irq gpio
 - rst-gpio				: reset gpio
 - vdd_ana-supply		: analog power supply for AFE panel
 - vdd_dig-supply		: digital power supply for AFE panel

Optional properties:
- pinctrl-names		: This should be defined if a target uses pinctrl framework.
			See "pinctrl" in Documentation/devicetree/bindings/pinctrl/msm-				       pinctrl.txt. It should specify the names of the configs that
			pinctrl can install in driver. Following are the pinctrl
			configs that can be installed:
			"pmx_ts_active" : Active configuration of pins, this should specify
					active config defined in pin groups of interrupt
					and reset gpio.
			"pmx_ts_suspend" : Disabled configuration of pins, this should
					specify sleep config defined in pin groups of
					interrupt and reset gpio.
			"pmx_ts_release" : Release configuration of pins, this should specify
					release config defined in pin groups of interrupt
					and reset gpio.
			"afe_pwr_active" : Active configuration of AFE power pin.
			"afe_pwr_suspend" : Disabled configuration of AFE power pin.
			"disp_vsn_active" : Active configuration of display VSN pin.
			"disp_vsn_suspend" : Disable configuration of display VSN pin.

Example:

	spi@f9966000 {
		jdi-bu21150@0 {
			compatible = "jdi,bu21150";
			reg = <0>;
			interrupt-parent = <&msmgpio>;
			interrupts = <61 0>;
			irq-gpio = <&msmgpio 61 0>;
			rst-gpio = <&msmgpio 60 0>;
			vdd_ana-supply = <&pm8916_l17>;
			vdd_dig-supply = <&pm8916_l6>;
			pinctrl-names = "pmx_ts_active","pmx_ts_suspend",
					"afe_pwr_active", "afe_pwr_suspend",
					"disp_vsn_active", "disp_vsn_suspend";
			pinctrl-0 = <&ts_int_active &ts_reset_active>;
			pinctrl-1 = <&ts_int_suspend &ts_reset_suspend>;
			pinctrl-2 = <&afe_pwr_active>;
			pinctrl-3 = <&afe_pwr_suspend>;
			pinctrl-4 = <&disp_vsn_active>;
			pinctrl-5 = <&disp_vsn_suspend>;
		};
	};

