* Serial

Currently defined compatibles:
- fsl,cpm1-smc-uart
- fsl,cpm2-smc-uart
- fsl,cpm1-scc-uart
- fsl,cpm2-scc-uart
- fsl,qe-uart

Example:

	serial@11a00 {
		device_type = "serial";
		compatible = "fsl,mpc8272-scc-uart",
			     "fsl,cpm2-scc-uart";
		reg = <11a00 20 8000 100>;
		interrupts = <28 8>;
		interrupt-parent = <&PIC>;
		fsl,cpm-brg = <1>;
		fsl,cpm-command = <00800000>;
	};
