zephyr/modusocket: Add dummy makefile() implementation.

zephyr/modusocket.c

@@ -450,6 +450,12 @@ STATIC mp_obj_t socket_recv(mp_obj_t self_in, mp_obj_t len_in) {
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_recv_obj, socket_recv);
 
+STATIC mp_obj_t socket_makefile(size_t n_args, const mp_obj_t *args) {
+    (void)n_args;
+    return args[0];
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_makefile_obj, 1, 3, socket_makefile);
+
 STATIC mp_obj_t socket_close(mp_obj_t self_in) {
     socket_obj_t *socket = self_in;
     if (socket->ctx != NULL) {
@@ -474,6 +480,7 @@ STATIC const mp_map_elem_t socket_locals_dict_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_readinto), (mp_obj_t)&mp_stream_readinto_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_readline), (mp_obj_t)&mp_stream_unbuffered_readline_obj},
     { MP_OBJ_NEW_QSTR(MP_QSTR_write), (mp_obj_t)&mp_stream_write_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_makefile), (mp_obj_t)&socket_makefile_obj },
 };
 STATIC MP_DEFINE_CONST_DICT(socket_locals_dict, socket_locals_dict_table);