ARM: dts: msm: Add device tree property to collect full ramdumps

Add device tree property to collect full ramdumps, without
any holes between segments, for subsystems that are loaded
by PIL, and whose ramdumps are collected, on SM8150.

Change-Id: Iccf24aca2ed4697c70bd209e9a5f379a26d61d2f
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>