Himax touch controller

Required properties:

 - compatible	: should be "himax,hxcommon"
 - reg			: i2c slave address of the device
 - interrupt-parent	: parent of interrupt
 - interrupts		: touch sample interrupt to indicate presense or release
				of fingers on the panel.
 - himax,irq-gpio	: irq gpio
 - himax,reset-gpio	: reset gpio

Optional property:
 - vdd-supply		: Analog power supply needed to power device
 - vcc_i2c-supply		: Power source required to pull up i2c bus
 - himax,i2c-pull-up	: specify to indicate pull up is needed
 - himax,disable-gpios	: specify to disable gpios in suspend (power saving)
 - himax,button-map		: virtual key code mappings to be used
 - himax,x-flip		: modify orientation of the x axis
 - himax,y-flip		: modify orientation of the y axis
 - himax,panel-coords	: touch panel min x, min y, max x and
					max y resolution
 - himax,display-coords	: display min x, min y, max x and
					max y resolution
 - himax,reset-delay	: reset delay for controller (ms), default 100
 - himax,fw-image-name	: name of firmware .img file in /etc/firmware
 - himax,power-down		: fully power down regulators in suspend
 - himax,do-lockdown	: perform one time lockdown procedure

Example:
	i2c@f9927000 { /* BLSP1 QUP5 */
		cell-index = <5>;
		compatible = "himax,hxcommon";
		#address-cells = <1>;
		#size-cells = <0>;
		reg-names = "qup_phys_addr";
		reg = <0xf9927000 0x1000>;
		interrupt-names = "qup_err_intr";
		interrupts = <0 99 0>;
		gpios = <&msmgpio 19 0>, /* SCL */
			<&msmgpio 18 0>; /* SDA */
		qcom,i2c-bus-freq = <100000>;
		qcom,i2c-src-freq = <19200000>;

		himax_ts@20 {
			compatible = "himax,hxcommon"
			reg = <0x20>;
			interrupt-parent = <&tlmm>;
			interrupts	= <255 0x2008>;
			vdd-supply 	= <&pm8994_l15>;
			avdd-supply = <&pm8994_l22>;
			himax,panel-coords = <0 720 0 1440>;
			himax,display-coords = <0 720 0 1440>;
			himax,irq-gpio = <&tlmm 255 0x2008>;
			himax,rst-gpio = <&tlmm 8 0x00>;
		};
	};