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/configs/korat.h b/include/configs/korat.h
index ea6ba89..7e74ef7 100644
--- a/include/configs/korat.h
+++ b/include/configs/korat.h
@@ -69,6 +69,7 @@
 #define CONFIG_SYS_OCM_DATA_ADDR	CONFIG_SYS_OCM_BASE
 #define CONFIG_SYS_PCI_BASE		0xe0000000	/* Internal PCI regs	*/
 #define CONFIG_SYS_PCI_MEMBASE		0x80000000	/* mapped pci memory	*/
+#define CONFIG_SYS_PCI_MEMBASE2		(CONFIG_SYS_PCI_MEMBASE + 0x20000000)
 
 /* Don't change either of these */
 #define CONFIG_SYS_PERIPHERAL_BASE	0xef600000	/* internal peripherals	*/