HDQ/1w for OMAP platforms

Required properties :
- compatible : Must be "ti,am43xx-hdq".
- ti,hwmods : Must be "hdq1w".
- reg: Should contain register location and length.
- interrupts: Should contain interrupt.
- clock: Clock input to HDQ1w controller.

Example:

	hdq: hdq@48347000 {
		compatible = "ti,am43xx-hdq";
		reg = <0x48347000 0x1000>;
		interrupts = <GIC_SPI 139 IRQ_TYPE_LEVEL_HIGH>;
		clocks = <&func_12m_clk>;
		clock-names = "fck";
		ti,hwmods = "hdq1w";
		status = "disabled";
	};
