- Sprinkle some KBD_IS_* and KBD_*_DONE macros in sunkbd_configure() as

- Sprinkle some KBD_IS_* and KBD_*_DONE macros in sunkbd_configure() as
  a band-aid allowing to call this function savely multiple times, e.g.
  during sckbdprobe() and sc_probe_unit(). Otherwise calling it a second
  time results in a non-working keyboard. This needs a lot of more work
  to actually do the right thing and work like expected.
- Let sunkbd_configure() return the number of the found keyboards, i.e.
  1 in case probing succeeds, as it's expected. The return values of the
  keyboard configure functions however currently aren't checked so this
  doesn't make a difference at the moment.
- Use FBSDID.