ppc4xx: Add pci_pre_init() for 405 boards

This patch removes the CFG_PCI_PRE_INIT option completely, since
it's not needed anymore with the patch from Matthias Fuchs with
the "weak" pci_pre_init() implementation.

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/amcc/taishan/taishan.c b/board/amcc/taishan/taishan.c
index 1a2e53b..bc976c7 100644
--- a/board/amcc/taishan/taishan.c
+++ b/board/amcc/taishan/taishan.c
@@ -236,7 +236,7 @@
  *	certain pre-initialization actions.
  *
  ************************************************************************/
-#if defined(CONFIG_PCI) && defined(CFG_PCI_PRE_INIT)
+#if defined(CONFIG_PCI)
 int pci_pre_init(struct pci_controller * hose )
 {
 	unsigned long strap;
@@ -253,7 +253,7 @@
 
 	return 1;
 }
-#endif /* defined(CONFIG_PCI) && defined(CFG_PCI_PRE_INIT) */
+#endif /* defined(CONFIG_PCI) */
 
 /*************************************************************************
  *  pci_target_init