ioh3420: Remove unreachable code

Report from smatch:
hw/ioh3420.c:128 ioh3420_initfn(35) info: ignoring unreachable code.
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Reviewed-by: NJuan Quintela <quintela@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@gmail.com>

hw/ioh3420.c

@@ -125,7 +125,6 @@ static int ioh3420_initfn(PCIDevice *d)
     rc = pcie_chassis_add_slot(s);
     if (rc < 0) {
         goto err_pcie_cap;
-        return rc;
     }
     pcie_cap_root_init(d);
     rc = pcie_aer_init(d, IOH_EP_AER_OFFSET);