bus/pci: fix leak for unbound devices

[ upstream commit 7c83a1e ]

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: c79a1c6 ("bus/pci: optimize bus scan")

Reported-by: Owen Hilyard <ohilyard@iol.unh.edu>
Signed-off-by: David Marchand <david.marchand@redhat.com>

drivers/bus/pci/linux/pci.c

@@ -331,7 +331,7 @@ pci_scan_one(const char *dirname, const struct rte_pci_addr *addr)
 		else
 			dev->kdrv = RTE_PCI_KDRV_UNKNOWN;
 	} else {
-		dev->kdrv = RTE_PCI_KDRV_NONE;
+		free(dev);
 		return 0;
 	}
 	/* device is valid, add in list (sorted) */