People are confused by the following error message that actually is
not for indicating a error.
    Cannot get control of hotplug hardware for pci %s
This patch changes this message to debug message.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by:  Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@hobbes.lan>
                        break;
        }
 
-       err("Cannot get control of hotplug hardware for pci %s\n",
+       dbg("Cannot get control of hotplug hardware for pci %s\n",
                        pci_name(dev));
 
        kfree(string.pointer);