* Chipone tddi touchscreen interface

Required properties:
- compatible		: "chipone-tddi"
- reg			: I2C slave address
- chipone,rst-gpio	: touch controller reset gpio
- chipone,irq-gpio	: touch controller interrupt gpio
- chipone,x-res		: horizontal resolution of tp
- chipone,y-res		: vertical resolution of tp

Example:

	chipone_tddi@48 {
		compatible = "chipone-tddi";
		reg = <0x48>;
		chipone,rst-gpio = <&ap_gpio 145 0x00>;
		chipone,irq-gpio = <&ap_gpio 144 0x00>;
		chipone,x-res = <720>;
		chipone,y-res = <1520>;
	};
