Revert previous commit, as it really is wrong to grow ukbd_trtab to an array
of 16-bit values. While at it, set the correct value for the Sleep button.

Likewise, keep forwarding the keys specific to the Sun Type 7 USB keyboard as
raw input (currently required for X), but making sure to use unassigned and
valid values this time.

Tested with modular-xorg-server 1.6.5nb11 and xf86-input-keyboard 1.3.2nb3.

(khorben)