PCI: acpiphp: Add is_hotplug_bridge detection
When system support hotplug bridge with children hotplug slots, we need to make sure that parent bridge get preallocated resource so later when device is plugged into children slot, those children devices will get resource allocated. We do not meet this problem, because for PCIe hotplug card, when acpiphp is used, pci_scan_bridge will set that for us when detect hotplug bit in slot cap. Reported-and-tested-by: NJason Baron <jbaron@redhat.com> Signed-off-by: NYinghai Lu <yinghai@kernel.org> Signed-off-by: NBjorn Helgaas <bhelgaas@google.com> Acked-by: NJason Baron <jbaron@redhat.com> Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
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