digi_acceleport: Drag the driver kicking and screaming into coding style

- The outbreak of acute bracketitus has been cured
- The belief that brackets should have spaces everywhere likewise
- Various other coding style tweaks
- Use baud rates not Bfoo in the speed setup switch
Signed-off-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>