Befor appling th diffs change to xc/programs/Xserver/hw/xfree68 and create the 
following directories:

./os-support/bsd
./vga256
./vga256/vga
./vga256/drivers
./vga256/drivers/et4000
./common_hw
./accel
./accel/et4000w32
./accel/et4000w32/cfb.w32
./accel/et4000w32/w32
./accel/cache

In xc/config/cf/xf86site.def is defined which servers should be built.
Look for Mc68020Architecture and change the defines appropriate to 
your need. Default is built all m68k NetBSD Atari servers.