P2P: Clear groups first on FLUSH command

This is needed to get proper P2P group removal processing for some test
cases. discovery_group_client followed by nfc_p2p_client was able to hit
a case where the P2P group idle timeout survived to the next group
instance because of the FLUSH command not clearing the group and this
timeout properly.

Signed-off-by: Jouni Malinen <j@w1.fi>

wpa_supplicant/ctrl_iface.c

@@ -6982,9 +6982,9 @@ static void wpa_supplicant_ctrl_iface_flush(struct wpa_supplicant *wpa_s)
 	}
 
 #ifdef CONFIG_P2P
+	wpas_p2p_group_remove(p2p_wpa_s, "*");
 	wpas_p2p_cancel(p2p_wpa_s);
 	p2p_ctrl_flush(p2p_wpa_s);
-	wpas_p2p_group_remove(p2p_wpa_s, "*");
 	wpas_p2p_service_flush(p2p_wpa_s);
 	p2p_wpa_s->global->p2p_disabled = 0;
 	p2p_wpa_s->global->p2p_per_sta_psk = 0;