ARM: dts: msm: Add memory dump devices for MSM8937

Add memory dump device to allocate and register various clients
with the memory dump driver. This also adds the required CMA
region for the memory dump driver. This is needed to collect
sub system information from different clients in case of dump.

CRs-Fixed: 2209256
Change-Id: I489129a271f00150d90ba3a5940ef998aa3af3e8
Signed-off-by: Mao Jinlong <jinlmao@codeaurora.org>