removed many vga drivers
removed many ethernet drivers
* sys/src/9/pc/devlm78.c: delete devlml xxx
delete more drivers
pcboot -> other/
boot/pbxxx -> other/
move some interesting drivers in other/
remove more drivers
* other/ether82543gc.c:
* sys/src/9/boot/: cleanup
* sys/src/9/pc/: confs moved in other/
* sys/src/9/pc/mkfile: cleanup
* sys/src/9/boot/bootmkfile: order entries alphabetically
* sys/src/9/boot/bootmkfile: comment
removed more ethernet drivers