ppc4xx: Consolidate pci_target_init() function

This patch removes the duplicted implementations of the pci_target_init()
function by introducing a weak default function for it. This weak default
has a different implementation for 440EP(x)/GR(x) PPC's. It can be
overridden by a board specific version (e.g. PMC440, korat).

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Matthias Fuchs <matthias.fuchs@esd.eu>
diff --git a/include/asm-ppc/4xx_pci.h b/include/asm-ppc/4xx_pci.h
index 30125a1..5400a03 100644
--- a/include/asm-ppc/4xx_pci.h
+++ b/include/asm-ppc/4xx_pci.h
@@ -49,4 +49,6 @@
 
 #define PCIDEVID_405GP	0x0
 
+void __pci_target_init(struct pci_controller *hose);
+
 #endif