cnss2: Add mini dump support

Register three WLAN RAM dump images (FBC, RDDM and remote heap)
to mini dump table so that they can be saved into file system
for further debugging.

Change-Id: I80bf0873ed6e6d105a0cf205479de4bb34184f16
Signed-off-by: Yue Ma <yuem@codeaurora.org>