- add finding the PCI IRQ Routing table
- add pci_get_capability and some simple uses to test it
Thanks to Michael N for his help on getting the region working as
I expected it to :)
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@435 a95241bf-73f2-0310-859d-f6bbb57e9c96