Input: add support for HiDeep touchscreen

* HiDeep Finger and Stylus touchscreen controller

Required properties:

- compatible		: must be "hideep,hideep-ts"

- reg			: I2C slave address, (e.g. 0x6C).

- interrupt-parent : Interrupt controller to which the chip is connected.

- interrupts : Interrupt to which the chip is connected.

Optional properties:

- vdd-supply	: It is the controller supply for controlling

					 main voltage(3.3V) through the regulator.

- vid-supply	: It is the controller supply for controlling

					IO voltage(1.8V) through the regulator.

- reset-gpios	: Define for reset gpio pin.

						It is to use for reset IC.

- touchscreen-size-x	: X axis size of touchscreen

- touchscreen-size-y	: Y axis size of touchscreen

- linux,keycodes	: Specifies an array of numeric keycode values to

			be used for reporting button presses. The array can

			contain up to 3 entries.

Example:

#include "dt-bindings/input/input.h"

i2c@00000000 {

	/* ... */

	touchscreen@6c {

		compatible = "hideep,hideep-ts";

		reg = <0x6c>;

		interrupt-parent = <&gpx1>;

		interrupts = <2 IRQ_TYPE_LEVEL_LOW>;

		vdd-supply = <&ldo15_reg>";

		vid-supply = <&ldo18_reg>;

		reset-gpios = <&gpx1 5 0>;

		touchscreen-size-x = <1080>;

		touchscreen-size-y = <1920>;

		linux,keycodes = <KEY_HOME>, <KEY_MENU>, <KEY_BACK>;

	};

};

hannstar	HannStar Display Corporation

haoyu	Haoyu Microelectronic Co. Ltd.

hardkernel	Hardkernel Co., Ltd

hideep	HiDeep Inc.

himax	Himax Technologies, Inc.

hisilicon	Hisilicon Limited.

hit	Hitachi Ltd.

	  To compile this driver as a module, choose M here: the

	  module will be called goodix.

config TOUCHSCREEN_HIDEEP

	tristate "HiDeep Touch IC"

	depends on I2C

	help

	  Say Y here if you have a touchscreen using HiDeep.

	  If unsure, say N.

	  To compile this driver as a moudle, choose M here : the

	  module will be called hideep_ts.

config TOUCHSCREEN_ILI210X

	tristate "Ilitek ILI210X based touchscreen"

	depends on I2C

obj-$(CONFIG_TOUCHSCREEN_EXC3000)	+= exc3000.o

obj-$(CONFIG_TOUCHSCREEN_FUJITSU)	+= fujitsu_ts.o

obj-$(CONFIG_TOUCHSCREEN_GOODIX)	+= goodix.o

obj-$(CONFIG_TOUCHSCREEN_HIDEEP)	+= hideep.o

obj-$(CONFIG_TOUCHSCREEN_ILI210X)	+= ili210x.o

obj-$(CONFIG_TOUCHSCREEN_IMX6UL_TSC)	+= imx6ul_tsc.o

obj-$(CONFIG_TOUCHSCREEN_INEXIO)	+= inexio.o