TAB/space cleanup.

Remove clause 3 and 4 from X68k server files written by Yasushi Yamasaki.

I've finally contacted with Yamasaki-san and he kindly answered
"no objection to change them to 2 clause license" in private mail.
Diffs to be committed have also been confirmed by him.
We appreciate all his contribution to early NetBSD/x68k.

initial import of existing netbsd xorg-server 1.10 sources in the
xorg-server.old subdir.