PCI, PCI Hotplug: introduce slot_name helpers

In preparation for cleaning up the various hotplug drivers
such that they don't have to manage their own 'name' parameters
anymore, we provide the following convenience functions:

	pci_slot_name()
	hotplug_slot_name()

These helpers will be used by individual hotplug drivers.

Cc: kristen.c.accardi@intel.com
Cc: matthew@wil.cx
Acked-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/drivers/pci/slot.c b/drivers/pci/slot.c
index b6ee352..4dd1c3e 100644
--- a/drivers/pci/slot.c
+++ b/drivers/pci/slot.c
@@ -121,7 +121,7 @@
 	int result = 0;
 	char *slot_name;
 
-	if (strcmp(kobject_name(&slot->kobj), name) == 0)
+	if (strcmp(pci_slot_name(slot), name) == 0)
 		return result;
 
 	slot_name = make_slot_name(name);