Keystone UART controller

Required properties:
- compatible : should be "ti,keystone-uart" for K2G, K2E, K2L and K2HL
               controllers

See Documentation/devicetree/bindings/serial/8250.txt for other required
and optional properties.

Example:

	uart1: serial@02531000 {
		compatible = "ti,keystone-uart", "ns16550a";
		current-speed = <115200>;
		reg-shift = <2>;
		reg-io-width = <4>;
		reg = <0x02531000 0x100>;
		interrupts = <GIC_SPI 165 IRQ_TYPE_EDGE_RISING>;
		status = "disabled";
		power-domains = <&k2g_pds K2G_DEV_UART1>;
		clocks = <&k2g_clks K2G_DEV_UART1 0>;
		clock-names = "fck";
	};