ARM: dts: msm: Enable complete subsystem ramdump for sdmmagpie

Add support to dump complete ramdump of subsystem(LPASS/CDSP) from
start of first segment to end of last segment without leaving any
hole in between.

Change-Id: I8f2ef17e3362f2750509be9d7a7f2d4b1812b310
Signed-off-by: Prateek Sood <prsood@codeaurora.org>