NVIDIA Camera focuser ad5823 driver interface.

Required properties:
- compatible : The driver is compatible with
	"nvidia,ad5823".

- reg : Should contain I2C slave address of the driver.

- af-pwdn-gpios : ad5823 power down GPIO

Example:

	ad5823@0c {
		compatible = "nvidia,ad5823";
		reg = <0x0c>;
		af-pwdn-gpios = <&gpio 223 0>; /* gpo PBB7 */
		status = "okay";
	};
