Use pci_is_bridge() to simplify code. No functional change. Requires:326c1cdae7
PCI: Rename pci_is_bridge() to pci_has_subordinate() Requires:1c86438c94
PCI: Add new pci_is_bridge() interface Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>