Use common interface to simplify ACPI PCI host bridge implementation.
Signed-off-by: NJiang Liu <jiang.liu@linux.intel.com>
Reviewed-by: NHanjun Guo <hanjun.guo@linaro.org>
Acked-by: NBjorn Helgaas <bhelgaas@google.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>