pci: do not log false failures for non-whitelisted devices

If probe of the whitelisted PCI device fails, reset ret to zero
to silently skip non-whitelisted PCI devices.

Fixes: 10f6c93cea38 ("eal: do not panic on PCI failures")

Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>

lib/librte_eal/common/eal_common_pci.c

@@ -443,6 +443,7 @@ rte_eal_pci_probe(void)
 				 dev->addr.devid, dev->addr.function);
 			rte_errno = errno;
 			failed++;
+			ret = 0;
 		}
 	}