Revert "mac80211: don't allow BA session actions during reconfig"

This reverts commit 8e97ae90346f688812b3071c08d9054bc47c81bd.

Commit is already included in the "Update compat-wireless from R5.SP6.01 to
 R5.SP7.01" commit. When rebasing the non-squashed branch Git mistakenly
applied the changes again to different places that had the same context.

Change-Id: I3f3bcb58b74705eb44de722ed3f1e6467e9a5bb5