Goodix GT1x series touch controller

Required properties:

 - compatible			: Should be "goodix,gt1x", compatible with the
				  of_match_table defined in driver.
 - reg				: I2C slave address of the device.

 - goodix,irq-gpio		: Interrupt gpio which is to provide interrupts to
				  host, same as "interrupts" node.
 - goodix,rst-gpio:		: Reset gpio to control the reset of chip.

Optional properties:

 - power-supply			: Power supply needed to power up the device, when use
				  external regulator, do not add this property.
 - goodix,ic_type		: Specify touch IC type.

Example:

        i2c@00000000 {
                /* ... */

                gt9xx@14 {
                        compatible = "goodix,gt1x";
                        reg = <0x14>;
                        status = "okay";

                        goodix,rst-gpio = <&msm_gpio 12 0x0>;
                        goodix,irq-gpio = <&msm_gpio 13 0x2800>;
                        goodix,ic_type	= "gt5688";
                };

                /* ... */
        };