mac80211_hwsim: refactor radio cleanup
mac80211_hwsim: refactor radio cleanup

Refactor the radio cleanup into a new function to later
allow deleting a single radio from the list.

Signed-off-by: Johannes Berg <bff32994ff0f8d048f262a8388145a71b6071bfe@intel.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs