soc: qcom: memory_dump_v2: add client support for memory dump v2

Add client support to register with the memory dump v2 driver to
take advantage of the new enhanced memory dump format.

Change-Id: I8b05d92b3e9f4d1dcaa6dffec8fe05401d72a7ee
Signed-off-by: Pratik Patel <pratikp@codeaurora.org>