iwlwifi: mvm: print the version of the firmware when it asserts

commit b900a87b2eb90c0b9586496c82a323a1b8832d73 upstream.

This can be useful to be able to spot the firmware version
from the error reports without needing to fetch it from
another place.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>