NXP I2C controller for LPC2xxx/178x/18xx/43xx

Required properties:
 - compatible: must be "nxp,lpc1788-i2c"
 - reg: physical address and length of the device registers
 - interrupts: a single interrupt specifier
 - clocks: clock for the device
 - #address-cells: should be <1>
 - #size-cells: should be <0>

Optional properties:
- clock-frequency: the desired I2C bus clock frequency in Hz; in
  absence of this property the default value is used (100 kHz).

Example:
i2c0: i2c@400a1000 {
	compatible = "nxp,lpc1788-i2c";
	reg = <0x400a1000 0x1000>;
	interrupts = <18>;
	clocks = <&ccu1 CLK_APB1_I2C0>;
	#address-cells = <1>;
	#size-cells = <0>;
};

&i2c0 {
	clock-frequency = <400000>;

	lm75@48 {
		compatible = "nxp,lm75";
		reg = <0x48>;
	};
};