mac80211: split CSA finalize function
mac80211: split CSA finalize function

Improves readability and modularity.

Signed-off-by: Michal Kazior <956a8aa249cc11dbf2733fc41294eabd5c99981c@tieto.com>
Signed-off-by: Johannes Berg <bff32994ff0f8d048f262a8388145a71b6071bfe@intel.com>

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