* I2C for Cortina platforms

Required properties :
- compatible : Must be "cortina,ca-i2c"
- reg : Offset and length of the register set for the device

Recommended properties :
- clock-frequency : desired I2C bus clock frequency in Hz. If not specified,
		    default value is 100000. Possible values are 100000,
		    400000 and 1000000.

Examples :

	i2c: i2c@f4329120 {
		compatible = "cortina,ca-i2c";
		reg = <0x0 0xf4329120 0x28>;
		clock-frequency = <400000>;
	};
