[POWERPC] Add support for PCI-Express nodes in the device tree

This adds support to recognize the PCIe device_type "pciex" and made
the portdrv buildable.

Signed-off-by: Jake Moilanen <moilanen@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 30a4e6a..74dc766 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -388,7 +388,7 @@
 
 	dev->current_state = 4;		/* unknown power state */
 
-	if (!strcmp(type, "pci")) {
+	if (!strcmp(type, "pci") || !strcmp(type, "pciex")) {
 		/* a PCI-PCI bridge */
 		dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
 		dev->rom_base_reg = PCI_ROM_ADDRESS1;