msm: pil-pronto: Add ramdump interface for Pronto

Add Pronto ramdump device and specify it's memory segments. So that
ramdump application can collect Pronto ramdump when it goes thru
subsystem restart level 3.

Change-Id: I3e8079da4101779615d2164c3b4758c607421940
Signed-off-by: Sameer Thalappil <sameert@codeaurora.org>