Can you please fix this patch to use the standard console device mechanism of U-Boot? Instead of introducing a new "console" variable. the standard mechanism of assigning to the stdin / stdout / stderr streams should be used.

Done. Attached is the patch to the patch. Additionally the patch fixes a problem with the environment not being placed correctly (lowboot and highboot positions interchanged).

The other boards should be fixed by adding the setenvs to the CONFIG_PREBOOT as well. As far as I am concerned you can delete the "console" variable from cfg_console.c.