msm: ADSPRPC: Register CMA region for minidump

Add CMA region to minidump entry during region
region create. Remove the entry when region is
unmapped.

Change-Id: I9b56b0a7a31347087e17702c50620a3f23f973fc
Acked-by: Ekansh Gupta <ekangupt@qti.qualcomm.com>
Signed-off-by: Jeya R <jeyr@codeaurora.org>