Expose mip guts

test/driver_mock.c

@@ -1,10 +1,6 @@
-static bool my_random(void) {
-  return mg_millis() & 1;
-}
-
 static bool mock_init(uint8_t *mac, void *data) {
   (void) mac, (void) data;
-  return my_random();
+  return true;
 }
 
 static size_t mock_tx(const void *buf, size_t len, void *data) {
@@ -19,7 +15,7 @@ static size_t mock_rx(void *buf, size_t len, void *data) {
 
 static bool mock_up(void *data) {
   (void) data;
-  return my_random();
+  return true;
 }
 
 struct mip_driver mip_driver_mock = {mock_init, mock_tx, mock_rx, mock_up, 0};