PCI: convert bus code to use bus_groups

The bus_attrs field of struct bus_type is going away soon, dev_groups
should be used instead.  This converts the PCI bus code to use the
correct field.

Cc: Bjorn Helgaas <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 8a00c06..607be58d 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -156,7 +156,7 @@
 extern struct device_attribute pci_dev_attrs[];
 extern const struct attribute_group *pcibus_groups[];
 extern struct device_type pci_dev_type;
-extern struct bus_attribute pci_bus_attrs[];
+extern const struct attribute_group *pci_bus_groups[];
 
 
 /**