soc: qcom: Add support for memory dump v2 driver

This is snapshot of the memory dump v2 driver as of msm-4.4
commit 'fb5706b7462b0b855d10da12ed88ebf10a2e8643'. This enables
memory dump feature. It allows various client subsystems to
register respective dump regions. This is needed to collect
system information in case of crash.

CRs-Fixed: 1053067
Change-Id: I610bc71ab3b266ccb582fa61a3bc8286c2f06726
Signed-off-by: Satyajit Desai <sadesai@codeaurora.org>