There is no need to have the various pty files clobber the /dev
directory when they are never used. Do not force a PR upgrade
right now as we don't have a good upgreade strategy for the v1
and the BSC config.
Some of our target applications require ext3/ext4 support for mounting
an MMC card. While the sysmobts-v1 hardware does not have an external
MMC card slot it is nice to have the same image available for this
hardware.