Fix driver initialization not to crash if driver does not use init2()

8a5ab9f5e56cd2f5781c2d92f41495e60d544780 fixed global driver context
for init2(), but it also broke driver initialization with driver
wrappers that do not use init2().. Fix this by setting wpa_s->global
before it gets dereferenced.

wpa_supplicant/wpa_supplicant.c

@@ -2166,6 +2166,8 @@ struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
 	if (wpa_s == NULL)
 		return NULL;
 
+	wpa_s->global = global;
+
 	t_iface = *iface;
 	if (global->params.override_driver) {
 		wpa_printf(MSG_DEBUG, "Override interface parameter: driver "
@@ -2189,8 +2191,6 @@ struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
 		return NULL;
 	}
 
-	wpa_s->global = global;
-
 	/* Notify the control interfaces about new iface */
 	if (wpas_notify_iface_added(wpa_s)) {
 		wpa_supplicant_deinit_iface(wpa_s);