the key of hash table should include the function value
the key of hash table should include the function value

We save all used PCI address in the hash table. The key is generated by domain,
bus and slot now. We will support multi function PCI device, so the key should
be generated by domain, bus, slot and function.

novel/fbsd-libvirt,cbosdo/libvirt,nertpinx/libvirt,shugaoye/libvirt,nertpinx/libvirt,soulxu/libvirt-xuhj,warewolf/libvirt,zhlcindy/libvirt-1.1.4-maintain,iam-TJ/libvirt,novel/fbsd-libvirt,foomango/libvirt,rlaager/libvirt,foomango/libvirt,zhlcindy/libvirt-1.1.4-maintain,rmarwaha/libvirt,novel/fbsd-libvirt,agx/libvirt,kantai/libvirt-vfork,bjzhang/libvirt,rmarwaha/libvirt1,trainstack/libvirt,taget/libvirt,dumbbell/libvirt,rmarwaha/libvirt1,eskultety/libvirt,shugaoye/libvirt,zippy2/libvirt,leilihh/libvirt,rmarwaha/libvirt,novel/fbsd-libvirt,wiedi/libvirt,olafhering/libvirt,elmarco/libvirt,iam-TJ/libvirt,taget/libvirt,zippy2/libvirt,wiedi/libvirt,wiedi/libvirt,rlaager/libvirt,danwent/libvirt-ovs,warewolf/libvirt,danwent/libvirt-ovs,rmarwaha/libvirt1,usc-isi/libvirt,jfehlig/libvirt,iam-TJ/libvirt,emaste/libvirt,leilihh/libvirt,emaste/libvirt,jeckersb/libvirt,rmarwaha/libvirt,jardasgit/libvirt,zhlcindy/libvirt-1.1.4-maintain,andreabolognani/libvirt,VenkatDatta/libvirt,warewolf/libvirt,usc-isi/libvirt,shugaoye/libvirt,leilihh/libvirt,VenkatDatta/libvirt,trainstack/libvirt,rmarwaha/libvirt1,novel/fbsd-libvirt,soulxu/libvirt-xuhj,nertpinx/libvirt,jfehlig/libvirt,iam-TJ/libvirt,datto/libvirt,foomango/libvirt,usc-isi/libvirt,agx/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,trainstack/libvirt,fabianfreyer/libvirt,novel/fbsd-libvirt,dumbbell/libvirt,taget/libvirt,andreabolognani/libvirt,zhlcindy/libvirt-1.1.4-maintain,crobinso/libvirt,wiedi/libvirt,fabianfreyer/libvirt,soulxu/libvirt-xuhj,eskultety/libvirt,usc-isi/libvirt,novel/fbsd-libvirt,fabianfreyer/libvirt,crobinso/libvirt,VenkatDatta/libvirt,rmarwaha/libvirt1,bjzhang/libvirt,elmarco/libvirt,siboulet/libvirt-openvz,rlaager/libvirt,bjzhang/libvirt,jardasgit/libvirt,datto/libvirt,wiedi/libvirt,iam-TJ/libvirt,olafhering/libvirt,cbosdo/libvirt,leilihh/libvirt,jardasgit/libvirt,agx/libvirt,crobinso/libvirt,jeckersb/libvirt,datto/libvirt,siboulet/libvirt-openvz,andreabolognani/libvirt,trainstack/libvirt,elmarco/libvirt,usc-isi/libvirt,emaste/libvirt,agx/libvirt,eskultety/libvirt,jeckersb/libvirt,datto/libvirt,trainstack/libvirt,olafhering/libvirt,foomango/libvirt,agx/libvirt,zippy2/libvirt,jardasgit/libvirt,soulxu/libvirt-xuhj,rmarwaha/libvirt,siboulet/libvirt-openvz,zippy2/libvirt,dumbbell/libvirt,eskultety/libvirt,shugaoye/libvirt,emaste/libvirt,danwent/libvirt-ovs,zhlcindy/libvirt-1.1.4-maintain,warewolf/libvirt,eskultety/libvirt,elmarco/libvirt,warewolf/libvirt,danwent/libvirt-ovs,danwent/libvirt-ovs,iam-TJ/libvirt,fabianfreyer/libvirt,rmarwaha/libvirt1,libvirt/libvirt,leilihh/libvirt,wiedi/libvirt,dumbbell/libvirt,trainstack/libvirt,novel/fbsd-libvirt,rlaager/libvirt,kantai/libvirt-vfork,elmarco/libvirt,bjzhang/libvirt,siboulet/libvirt-openvz,warewolf/libvirt,nertpinx/libvirt,emaste/libvirt,cbosdo/libvirt,shugaoye/libvirt,dumbbell/libvirt,foomango/libvirt,cbosdo/libvirt,datto/libvirt,libvirt/libvirt,dumbbell/libvirt,kantai/libvirt-vfork,wiedi/libvirt,VenkatDatta/libvirt,jeckersb/libvirt,emaste/libvirt,fabianfreyer/libvirt,rlaager/libvirt,taget/libvirt,taget/libvirt,kantai/libvirt-vfork,crobinso/libvirt,jeckersb/libvirt,cbosdo/libvirt,nertpinx/libvirt,novel/fbsd-libvirt,iam-TJ/libvirt,bjzhang/libvirt,warewolf/libvirt,soulxu/libvirt-xuhj,rmarwaha/libvirt,jfehlig/libvirt,trainstack/libvirt,emaste/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,jfehlig/libvirt,libvirt/libvirt,jeckersb/libvirt,kantai/libvirt-vfork,libvirt/libvirt,leilihh/libvirt,jeckersb/libvirt,rmarwaha/libvirt,olafhering/libvirt,siboulet/libvirt-openvz