* Freescale i.MX UART controller

Required properties:
- compatible : should be "fsl,imx21-uart"
- reg : Address and length of the register set for the device
- interrupts : Should contain UART interrupt number

Optional properties:
- fsl,uart-has-rtscts: indicate that RTS/CTS signals are used

Note: Each uart controller should have an alias correctly numbered
in "aliases" node.

Example:

- From imx51.dtsi:
aliases {
	serial0 = &uart1;
	serial1 = &uart2;
	serial2 = &uart3;
};

uart1: serial@73fbc000 {
	compatible = "fsl,imx51-uart", "fsl,imx21-uart";
	reg = <0x73fbc000 0x4000>;
	interrupts = <31>;
	status = "disabled";
}

- From imx51-babbage.dts:
uart1: serial@73fbc000 {
	fsl,uart-has-rtscts;
	status = "okay";
};