qemu: replace calls to virDomainPCIAddressReserveNext*() with static function
qemu: replace calls to virDomainPCIAddressReserveNext*() with static function

An upcoming commit will remove the "flag" argument from all the calls
to reserve the next available address|slot, but I don't want to change
the arguments in the hypervisor-agnostic
virDomainPCIAddressReserveNext*() functions, so this patch places a
simple qemu-specific wrapper around those functions - the new
functions don't take a flags arg, but grab it from the device's
info->pciConnectFlags.

olafhering/libvirt,fabianfreyer/libvirt,datto/libvirt,jfehlig/libvirt,libvirt/libvirt,taget/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,datto/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,jardasgit/libvirt,datto/libvirt,andreabolognani/libvirt,olafhering/libvirt,eskultety/libvirt,jardasgit/libvirt,crobinso/libvirt,nertpinx/libvirt,zippy2/libvirt,olafhering/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,taget/libvirt,andreabolognani/libvirt,libvirt/libvirt,jfehlig/libvirt,nertpinx/libvirt,libvirt/libvirt,andreabolognani/libvirt,zippy2/libvirt,nertpinx/libvirt,jardasgit/libvirt,taget/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,jfehlig/libvirt,crobinso/libvirt,taget/libvirt,jardasgit/libvirt,crobinso/libvirt,olafhering/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,nertpinx/libvirt,crobinso/libvirt,datto/libvirt,taget/libvirt,eskultety/libvirt,datto/libvirt,zippy2/libvirt,eskultety/libvirt,eskultety/libvirt,eskultety/libvirt,zippy2/libvirt,fabianfreyer/libvirt,libvirt/libvirt