ACPI / hotplug / PCI: Drop func field from struct acpiphp_bridge

Since the func pointer in struct acpiphp_context can always be used
instead of the func pointer in struct acpiphp_bridge, drop the
latter.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>

drivers/pci/hotplug/acpiphp.h

@@ -79,8 +79,6 @@ struct acpiphp_bridge {
 	acpi_handle handle;
 
 	struct acpiphp_context *context;
-	/* Ejectable PCI-to-PCI bridge (PCI bridge and PCI function) */
-	struct acpiphp_func *func;
 
 	int nr_slots;
 

drivers/pci/hotplug/acpiphp_glue.c

@@ -181,7 +181,7 @@ static void free_bridge(struct kref *kref)
 	context = bridge->context;
 	/* Release the reference acquired by acpiphp_enumerate_slots(). */
 	if (context->handler_for_func)
-		put_bridge(bridge->func->slot->bridge);
+		put_bridge(context->func->slot->bridge);
 
 	put_device(&bridge->pci_bus->dev);
 	pci_dev_put(bridge->pci_dev);
@@ -1212,7 +1212,6 @@ void acpiphp_enumerate_slots(struct pci_bus *bus)
 	}
 	if (context->handler_for_func) {
 		/* Notify handler already installed. */
-		bridge->func = context->func;
 		get_bridge(context->func->slot->bridge);
 		return;
 	}