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
- interrupt-parent : the phandle for the interrupt controller that
  services interrupts for this module.
- interrupts : the interrupt number for the SHAM module.

Optional properties:
- dmas: DMA controller phandle and DMA request ordered pair.
	Only one rx pair is valid per SHAM module.
- dma-names: DMA request name. This string corresponds 1:1 with
	the ordered pair in dmas. The string naming is to be
	"rx" for RX request.

Example:
	/* AM335x */
	sham: sham@53100000 {
		compatible = "ti,omap4-sham";
		ti,hwmods = "sham";
		#address-cells = <1>;
		#size-cells = <0>;
		reg = <0x53100000 0x200>;
		interrupt-parent = <&intc>;
		interrupts = <109>;
		dmas = <&edma 36>;
		dma-names = "rx";
	};
