ROHM BH1750 - ALS, Ambient light sensor

Required properties:

- compatible: Must be one of:
    "rohm,bh1710"
    "rohm,bh1715"
    "rohm,bh1721"
    "rohm,bh1750"
    "rohm,bh1751"
- reg: the I2C address of the sensor

Example:

light-sensor@23 {
	compatible = "rohm,bh1750";
	reg = <0x23>;
};
