OMAP SoC SHA crypto Module

Required properties:

- compatible : Should contain entries for this and backward compatible
  SHAM versions:
  - "ti,omap2-sham" for OMAP2 & OMAP3.
  - "ti,omap4-sham" for OMAP4 and AM33XX.
  Note that these two versions are incompatible.
- ti,hwmods: Name of the hwmod associated with the SHAM module
- reg : Offset and length of the register set for the module
- interrupts : the interrupt-specifier for the SHAM module.

Optional properties:
- dmas: DMA specifiers for the rx dma. See the DMA client binding,
	Documentation/devicetree/bindings/dma/dma.txt
- dma-names: DMA request name. Should be "rx" if a dma is present.

Example:
	/* AM335x */
	sham: sham@53100000 {
		compatible = "ti,omap4-sham";
		ti,hwmods = "sham";
		reg = <0x53100000 0x200>;
		interrupts = <109>;
		dmas = <&edma 36>;
		dma-names = "rx";
	};