[POWERPC] 4xx: PLB to PCI-X support

This adds base support code for the 4xx PCI-X bridge. It also provides
placeholders for the PCI and PCI-E version but they aren't supported
with this patch.

The bridges are configured based on device-tree properties.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile
index 85cf8c6..9a20ef4f 100644
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -27,6 +27,9 @@
 obj-$(CONFIG_PPC_83xx)		+= ipic.o
 obj-$(CONFIG_4xx)		+= uic.o
 obj-$(CONFIG_XILINX_VIRTEX)	+= xilinx_intc.o
+ifeq ($(CONFIG_PCI),y)
+obj-$(CONFIG_4xx)		+= ppc4xx_pci.o
+endif
 endif
 
 # Temporary hack until we have migrated to asm-powerpc