*/*: Fix wpa_supplicant* and hostapd* EAPOL_TEST build

Fix EAPOL_TEST build. Local funcion os_fdatasync() is valid under
FreeBSD as fdatasync(2) is supported.

PR:		261636
Reported by:	David Siebörger <drs-freebsd@sieborger.nom.za>
MFH:		2022Q1