wifi: mac80211: always initialize match_auth

My previous patch only initialized match_auth when the
ifmgd->auth_data exists, but that was wrong, it should
always be set. Fix that.

Fixes: 310c8387

 ("wifi: mac80211: clean up connection process")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/3151f5d0-c18f-413d-b34b-b94f095b947c@moroto.mountain
Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240301193633.1a3fc370f211.I979dd222b3b5eb5e1437886e5f7c2355eeccb9f7@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>