iw: fix memory leak inside register_mgmt_frame
iw: fix memory leak inside register_mgmt_frame

Signed-off-by: John Crispin <a51dda7c7ff50b61eaea0444371f4a6a9301e501@phrozen.org>
Signed-off-by: Johannes Berg <bff32994ff0f8d048f262a8388145a71b6071bfe@intel.com>

greearb/iw-ct,greearb/iw-ct