cd6cd68d18
- Add workaround for the problematic PnP BIOS which does not assign irq resource for the PS/2 mouse device node; if there is no irq assigned for the PS/2 mouse node, refer to device.hints for an irq number. If we still don't find an irq number in the hints database, use a hard-coded value. - Delete unused ivars. - Bit of clean up in probe/attach. - Add PnP ID for the PS/2 mouse port on some IBM ThinkPad models.