PCI: Use pci_is_bridge() to simplify code

Use pci_is_bridge() to simplify code.  No functional change.

Requires: 326c1cdae741 PCI: Rename pci_is_bridge() to pci_has_subordinate()
Requires: 1c86438c9423 PCI: Add new pci_is_bridge() interface
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 138bdd6..e399d00 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -1629,9 +1629,7 @@
 
 	down_read(&pci_bus_sem);
 	list_for_each_entry(dev, &bus->devices, bus_list)
-		if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
-		    dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
-			if (dev->subordinate)
+		if (pci_is_bridge(dev) && pci_has_subordinate(dev))
 				__pci_bus_size_bridges(dev->subordinate,
 							 &add_list);
 	up_read(&pci_bus_sem);