For devices not bound to any Linux kernel module, we leak a pci object
since it is never added to the PCI bus device list.
Fixes: c79a1c6746 ("bus/pci: optimize bus scan")
Cc: stable@dpdk.org
Reported-by: Owen Hilyard <ohilyard@iol.unh.edu>
Signed-off-by: David Marchand <david.marchand@redhat.com>