Binding for Dialog's DA9063 PMIC led driver.

Required properties:
- compatible: "dlg,da9063-leds".

Each LED is represented as a sub-node of the leds device.

Required sub-node properties:

- dlg,led-gpio-reg: The register offset for the GPIO configuration register,.
and the mask to access the GPIO configuration register (each register
configures two GPIO pins)
- dlg,dlg,led-reg: The register offset for the LED configuration register.

Optional properties:

- dlg,inverse-polarity: Invert the brightness pin polarity.

Example:

leds {
	compatible = "dlg,da9063-leds";
	#address-cells = <1>;
	#size-cells = <1>;

	led@0xc6 {
		dlg,led-gpio-reg = <0x1a 0x0f>;
		dlg,led-reg = <0xc6>;
		dlg,inverse-polarity;
		linux,default-trigger = "backlight";
	};

	led@0xc7 {
		dlg,led-gpio-reg = <0x1c 0x0f>;
		dlg,led-reg = <0xc7>;
		linux,default-trigger = "heartbeat";
	};

	led@0xc8 {
		dlg,led-gpio-reg = <0x1c 0xf0>;
		dlg,led-reg = <0xc8>;
		linux,default-trigger = "heartbeat";
	};
};
