PCI_IOV_ADD_VF(9) on FreeBSD

The text 60b7aea2d73a, as FreeBSD 13.2-RELEASE, FreeBSD 13.1-RELEASE, FreeBSD 13.0-RELEASE shipped it.

inform a PF driver that a VF is being created

PCI_IOV_ADD_VF(9) on FreeBSD now