pci: Do not check if a bus exist in pci_parse_devaddr.

Actually, pci_parse_devaddr checks if the dom/bus of the PCI address exist. But
this should be the jobs of a caller. In fact, the two callers of this function
will try to retrieve the PCIBus related to the devaddr and return an error if
they cannot.
Signed-off-by: NAnthony PERARD <anthony.perard@citrix.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/pci.c

@@ -529,10 +529,6 @@ int pci_parse_devaddr(const char *addr, int *domp, int *busp,
     if (*e)
 	return -1;
 
-    /* Note: QEMU doesn't implement domains other than 0 */
-    if (!pci_find_bus(pci_find_root_bus(dom), bus))
-	return -1;
-
     *domp = dom;
     *busp = bus;
     *slotp = slot;