soc: qcom: dcc: DCC driver for SDM660

This is a snapshot of dcc driver file 'dcc.c' from msm-4.4
at 'commit 3906d34c64e54e06'("soc: qcom: Add Minidump support").

DCC (Data Capture and Compare) is a DMA engine which is used to save
configuration data or system memory contents during catastrophic failure
or SW trigger.

It can also perform CRC over the same configuration or memory space.

Change-Id: I12db0e4cff145657bc81100115e8a7a641f60210
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>