soc: qcom: Add snapshot of the memory dump v2 driver

This is a snapshot of the memory dump_v2 driver as of msm-4.9
commit '04470f15eff0effa10b3d69d13d3bc061e951bd6'.("Add support
for generic memory dump entry allocator") Currently, each dump
table entry is being registered in several places in the kernel.
Add centralized support in memory dump driver to parse the device
tree to register and allocate dump table entries. We rely on CMA
memory pool to allocate memory for the dump entries. Clients can
either use the generic approach or configure the dump table entries
independently using the existing framework.

Change-Id: I6a2db1e4c86952db07dc39c8fbbbdc88768db999
Signed-off-by: Rama Aparna Mallavarapu <aparnam@codeaurora.org>