Merge "msm: gsi: initial commit of GSI driver" into msm-4.8

* Qualcomm Technologies, Inc. GSI driver module

GSI is a HW accelerator that supports Generic SW Interfaces (GSI) which are

peripheral specific (IPA in this case).

GSI translates SW transfer elements (TRE) into TLV transactions which are

then processed by the peripheral.

This Driver configures and communicates with GSI HW.

Required properties:

- compatible:		Must be "qcom,msm_gsi"

Example:

	qcom,msm-gsi {

		compatible = "qcom,msm_gsi";

	}

obj-$(CONFIG_GSI) += gsi.o gsi_dbg.o