wpa: Fix WITHOUT_WPA_SUPPLICANT_EAPOL build

Reported by: FreeBSD Build Option Survey

		https://callfortesting.org/results/bos-2021-11-04/

Fixes: c1d255d3ffdbe447de3ab875bf4e7d7accc5bfc5

(cherry picked from commit c9516b83c14f2dcec57bd175e418c152a0cec947)