med: ttymxc3: allow rw access to world

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
med: don't show tux logo

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
med: rotate display by 180 degrees

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>