* MELFAS MMS114 touchscreen controller

Required properties:
- compatible: must be "melfas,mms114"
- reg: I2C address of the chip
- interrupts: interrupt to which the chip is connected
- x-size: horizontal resolution of touchscreen
- y-size: vertical resolution of touchscreen

Optional properties:
- contact-threshold:
- moving-threshold:
- x-invert: invert X axis
- y-invert: invert Y axis

Example:

	i2c@00000000 {
		/* ... */

		touchscreen@48 {
			compatible = "melfas,mms114";
			reg = <0x48>;
			interrupts = <39 0>;
			x-size = <720>;
			y-size = <1280>;
			contact-threshold = <10>;
			moving-threshold = <10>;
			x-invert;
			y-invert;
		};

		/* ... */
	};
