ARM: dts: msm: Add memory dump area for Lito

Memory dump area needs to be allocated in boot up phase.
It will be used in memory dump case to collect information
for debug.

Change-Id: Ie32329d03081ee8c7dd2a450cfbb6bb660f1c7aa
Signed-off-by: Mao Jinlong <jinlmao@codeaurora.org>