Xilinx ZynqMP SHA3(keccak-384) hw acceleration support.

The ZynqMp PS-SHA hw accelerator is used to calculate the
SHA3(keccak-384) hash value on the given user data.

Required properties:
- compatible:	should contain "xlnx,zynqmp-keccak-384"

Example:
	xlnx_keccak_384: sha384 {
		compatible = "xlnx,zynqmp-keccak-384";
	};
