wifi: mac80211: fix memory leak in ieee80211_mgd_assoc_ml_reconf()

Free the "data" allocation before returning on this error path.

Fixes: 36e05b0b ("wifi: mac80211: Support dynamic link addition and removal")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://patch.msgid.link/7ad826a7-7651-48e7-9589-7d2dc17417c2@stanley.mountain


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