MOXA ART Ethernet Controller

Required properties:

- compatible : Must be "moxa,moxart-mac"
- reg : Should contain register location and length
- interrupts : Should contain the mac interrupt number

Example:

	mac0: mac@90900000 {
		compatible = "moxa,moxart-mac";
		reg =	<0x90900000 0x100>;
		interrupts = <25 0>;
	};

	mac1: mac@92000000 {
		compatible = "moxa,moxart-mac";
		reg =	<0x92000000 0x100>;
		interrupts = <27 0>;
	};
