drivers: cnss: Avoid registering cnss for minidump

Avoid registering cnss to minidump framework. This is done
to unblock minidump feature as changes from cnss side are not
available.

Change-Id: I5c0b0db440fd7837b7c66656c7b60176c8125724
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>