* techpoint,tpxxxx Decoder

Required Properties:
- compatible: should be "techpoint,tpxxxx"
- clocks: reference to the 27M xvclk input clock.
- clock-names: should be "xvclk".
- dovdd-supply: Digital I/O voltage supply, 1.8 volts
- avdd-supply: Analog voltage supply, 3.3 volts
- dvdd-supply: Digital core voltage supply, 1.2 volts
- reset-gpios: Low active reset gpio
- pwdn-gpios: High active power-down gpio

Attention:
techpoint device address (7bit)
techpoint + evb reuse the power bus

Example:
&i2c1 {
	status = "okay";

	// BT1120
	tp9930: tp9930@45 {
		compatible = "techpoint,tp9930";
		reg = <0x45>;
		clocks = <&cru CLK_MIPICSI_OUT>;
		clock-names = "xvclk";
		avdd-supply = <&vcc_avdd>;
		dovdd-supply = <&vcc_dovdd>;
		dvdd-supply = <&vcc_dvdd>;
		power-domains = <&power RV1126_PD_VI>;
		pinctrl-names = "rockchip,camera_default";
		pinctrl-0 = <&mipicsi_clk0 &cifm0_bt1120_ctl>;
		rockchip,grf = <&grf>;
		reset-gpios = <&gpio3 RK_PC4 GPIO_ACTIVE_LOW>;
		power-gpios = <&gpio2 RK_PA2 GPIO_ACTIVE_HIGH>;
		rockchip,camera-module-index = <0>;
		rockchip,camera-module-facing = "back";
		rockchip,camera-module-name = "default";
		rockchip,camera-module-lens-name = "default";
		port {
			cam_para_out1: endpoint {
				remote-endpoint = <&cif_para_in>;
				bus-width = <16>;
				pclk-sample = <1>;
			};
		};
	};

	// MIPI
	tp2855: tp2855@44 {
		compatible = "techpoint,tp2855";
		reg = <0x44>;
		clocks = <&cru CLK_MIPICSI_OUT>;
		clock-names = "xvclk";
		avdd-supply = <&vcc_avdd>;
		dovdd-supply = <&vcc_dovdd>;
		dvdd-supply = <&vcc_dvdd>;
		power-domains = <&power RV1126_PD_VI>;
		pinctrl-names = "rockchip,camera_default";
		pinctrl-0 = <&mipicsi_clk0>;
		reset-gpios = <&gpio3 RK_PC4 GPIO_ACTIVE_LOW>;
		power-gpios = <&gpio2 RK_PA2 GPIO_ACTIVE_HIGH>;
		rockchip,camera-module-index = <1>;
		rockchip,camera-module-facing = "front";
		rockchip,camera-module-name = "tp2855";
		rockchip,camera-module-lens-name = "tp2855";

		port {
			ucam_out0: endpoint {
				remote-endpoint = <&mipi_in_ucam0>;
				data-lanes = <1 2 3 4>;
			};
		};
	};
};