1MOXA ART GPIO Controller
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3Required properties:
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5- #gpio-cells : Should be 2, The first cell is the pin number,
6		the second cell is used to specify polarity:
7			0 = active high
8			1 = active low
9- compatible : Must be "moxa,moxart-gpio"
10- reg : Should contain registers location and length
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12Example:
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14	gpio: gpio@98700000 {
15		gpio-controller;
16		#gpio-cells = <2>;
17		compatible = "moxa,moxart-gpio";
18		reg =	<0x98700000 0xC>;
19	};
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