PowerPC: change board specific early pci_init() into generic.

Signed-off-by: Andre Schwarz <andre.schwarz@matrix-vision.de>
diff --git a/include/configs/BAB7xx.h b/include/configs/BAB7xx.h
index 4d83786..555145e 100644
--- a/include/configs/BAB7xx.h
+++ b/include/configs/BAB7xx.h
@@ -269,6 +269,7 @@
  * PCI stuff
  */
 #define CONFIG_PCI                                /* include pci support */
+#define CONFIG_SYS_EARLY_PCI_INIT
 #define CONFIG_PCI_PNP                            /* pci plug-and-play */
 #define CONFIG_PCI_HOST         PCI_HOST_AUTO
 #undef  CONFIG_PCI_SCAN_SHOW