drivers: soc: Add devcoredump based ramdump APIs

Introduce elf/non-elf dump APIs using devcoredump. These APIs
can be utilized by kernel clients to dump their memory regions
independently.

Change-Id: If4f5bcc0d4954b6f47a6893668d6a2a857bb0057
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>