The included patch cleans up the EISA code :

- Documentation update,
- Remove i386 EISA ID reservation (handled in the generic code),
- Add some preliminary support for EISA-like VLB cards (Adaptec 287x),
- Add some stricter dependancies for EISA_VIRTUAL_ROOT
- Preliminary support for EISA DMA,
- Much more conservative probing,
- EISA IDs list update (Compaq stuff).