FT: Force key configuration after association in FT-over-DS

This seems to be needed at least with mac80211 when a STA is using
FT-over-DS to reassociate back to the AP when the AP still has the
previous association state.

src/ap/wpa_auth.c

@@ -1208,7 +1208,7 @@ int wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
 		break;
 	case WPA_ASSOC_FT:
 #ifdef CONFIG_IEEE80211R
-		if (!sm->pairwise_set) {
+		if (!sm->pairwise_set || sm->ft_over_ds) {
 			wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
 				   "after association");
 			wpa_ft_install_ptk(sm);