adhoc: start both eapol SM's

Commit 1f910f84b47d ("eapol: Use eapol_start in authenticator mode too")
introduced the requirement that authentication eapol_sm objects also had
to be started via eapol_start.  Adhoc was never updated to do that.

src/adhoc.c

@@ -302,6 +302,7 @@ static void adhoc_start_rsna(struct sta_state *sta, const uint8_t *gtk_rsc)
 	eapol_register(sta->sm_a);
 
 	eapol_start(sta->sm);
+	eapol_start(sta->sm_a);
 
 	return;