VIA/Wondermedia VT8500 UART Controller
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Required properties:
- compatible : "via,vt8500-uart"
- reg : Should contain 1 register ranges(address and length)
- interrupts : UART interrupt
- clocks : phandle to the uart source clock (usually a 24Mhz fixed clock)

Example:

	uart@d8210000 {
		compatible = "via,vt8500-uart";
		reg = <0xd8210000 0x1040>;
		interrupts = <47>;
		clocks = <&ref24>;
	};
