hostapd: revert upstream commit to fix #13156

hostapd: revert upstream commit to fix #13156

Commit e978072baaca ("Do prune_association only after the STA is
authorized") causes issues when an STA roams from one interface to
another interface on the same PHY. The mt7915 driver is not able to
handle this properly. While the commits fixes a DoS, there are other
devices and drivers with the same limitation, so revert to the orginal
behavior for now, until we have a better solution in place.

Fixes: #13156
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
(cherry picked from commit 324673914d42f5fb9b70cc73e955117828b99f3b)