DS90UB948-Q1 1080p FPDLINK III to OpenLDI DeSerializer driver

Required properties:
- compatible : should be "ti,ds90uh948".
- reg : i2c regmap address

Optional properties:
- ti,enable-bchnl-i2c : Enable I2C passthrough
- ti,enable-2clock-filter : Enable/disable HSync/Vsync/Data-Enable inputs
- ti,enable-gpio3 : Enable/Disable GPIO3 configuration for DS90UB948
- ti,gpio3-dir : Set GPIO3 direction as input/output/tri-state
- ti,gpio3-val : GPIO3 output value to drive pin low or high

Examples:
        i2c@3160000 {
                ds90uh948@30 {
                        compatible = "ti,ds90uh948";
                        status = "okay";
                        reg = <0x30>;
                        ti,enable-bchnl-i2c = <1>;
                        ti,enable-2clock-filter = <0>;
                        ti,enable-gpio3 = <1>;
                        ti,gpio3-dir = <0>;
                        ti,gpio3-val = <1>;
                };
}