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* NXP PCA953x I2C GPIO multiplexer

Required properties:
 - compatible: Has to contain one of the following:
	nxp,pca9505
	nxp,pca9534
	nxp,pca9535
	nxp,pca9536
	nxp,pca9537
	nxp,pca9538
	nxp,pca9539
	nxp,pca9554
	nxp,pca9555
	nxp,pca9556
	nxp,pca9557
	nxp,pca9574
	nxp,pca9575
	nxp,pca9698
	nxp,pcal6524
	nxp,pcal9555a
	maxim,max7310
	maxim,max7312
	maxim,max7313
	maxim,max7315
	ti,pca6107
	ti,pca9536
	ti,tca6408
	ti,tca6416
	ti,tca6424
	ti,tca9539
	ti,tca9554
	onnn,pca9654
	exar,xra1202
 - gpio-controller: if used as gpio expander.
 - #gpio-cells: if used as gpio expander.
 - interrupt-controller: if to be used as interrupt expander.
 - #interrupt-cells: if to be used as interrupt expander.

Optional properties:
 - interrupts: interrupt specifier for the device's interrupt output.
 - reset-gpios: GPIO specification for the RESET input. This is an
		active low signal to the PCA953x.
 - vcc-supply:	power supply regulator.

Example:


	gpio@20 {
		compatible = "nxp,pca9505";
		reg = <0x20>;
		pinctrl-names = "default";
		pinctrl-0 = <&pinctrl_pca9505>;
		gpio-controller;
		#gpio-cells = <2>;
		interrupt-parent = <&gpio3>;
		interrupts = <23 IRQ_TYPE_LEVEL_LOW>;
	};


Example with Interrupts:


	gpio99: gpio@22 {
		compatible = "nxp,pcal6524";
		reg = <0x22>;
		interrupt-parent = <&gpio6>;
		interrupts = <1 IRQ_TYPE_EDGE_FALLING>;	/* gpio6_161 */
		interrupt-controller;
		#interrupt-cells = <2>;
		vcc-supply = <&vdds_1v8_main>;
		gpio-controller;
		#gpio-cells = <2>;
		gpio-line-names =
			"hdmi-ct-hpd", "hdmi.ls-oe", "p02", "p03", "vibra", "fault2", "p06", "p07",
			"en-usb", "en-host1", "en-host2", "chg-int", "p14", "p15", "mic-int", "en-modem",
			"shdn-hs-amp", "chg-status+red", "green", "blue", "en-esata", "fault1", "p26", "p27";
	};

	ts3a227@3b {
		compatible = "ti,ts3a227e";
		reg = <0x3b>;
		interrupt-parent = <&gpio99>;
		interrupts = <14 IRQ_TYPE_EDGE_RISING>;
		ti,micbias = <0>;	/* 2.1V */
	};