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

Add memory dump v2 driver from msm-4.19
commit 034b7f3bfb2c ("msm: cvp: Fix page fault when open 16 cvp sessions").
Remove dmac_flush_range since it's deprecated.

Change-Id: Ibcc42c0d737abbb304a222ac51cfdd94019af534
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>