mac80211: add comment for rx_path_lock
mac80211: add comment for rx_path_lock

Add a comment explaining how the RX path lock is used.

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

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