* Sony IMX258 MIPI sensor

Required Properties:
- compatible: should be "sony,imx258"
- clocks: reference to the 24M xvclk input clock.
- clock-names: should be "xvclk".
- dovdd-supply: Digital I/O voltage supply, 1.8 volts
- avdd-supply: Analog voltage supply, 2.8 volts
- dvdd-supply: Digital core voltage supply, 1.2 volts
- reset-gpios: Low active reset gpio

The device node must contain one 'port' child node for its digital output
video port, in accordance with the video interface bindings defined in
Documentation/devicetree/bindings/media/video-interfaces.txt.

Example:
//rk3399 evb board
&i2c1 {
	status = "okay";
	imx258_eeprom: imx258_eeprom@0x50 {
		compatible = "sony,imx258_eeprom";
		status = "okay";
		reg = <0x50>;
	};
	imx258: imx258@10 {
		eeprom-ctrl = <&imx258_eeprom>;
		compatible = "sony,imx258";
		status = "okay";
		reg = <0x10>;
		clocks = <&cru SCLK_CIF_OUT>;
		clock-names = "xvclk";
		//reset pin control by hardware,used this pin switch to mipi input
		//1->mipi input, 0->hdmi in
		reset-gpios = <&gpio2 10 GPIO_ACTIVE_LOW>;
		pinctrl-names = "rockchip,camera_default";
		pinctrl-0 = <&cif_clkout>;
		rockchip,camera-module-index = <0>;
		rockchip,camera-module-facing = "back";
        	rockchip,camera-module-name = "RK-GZ-13M-1-v1";
		rockchip,camera-module-lens-name = "LG500627G";
		port {
			ucam_out0: endpoint {
				remote-endpoint = <&mipi_in_ucam0>;
				data-lanes = <1 2 3 4>;
			};
		};
	};
};
