powerpc/pci: Add calls to set_pcie_port_type() and set_pcie_hotplug_bridge()

We are missing these when building the pci_dev from scratch off
the Open Firmware device-tree

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>