4xx: Fix PCI memory mapping on CPCI405 boards

This patch fixes an issue with overlapping PCI regions
on boards with more than 64MB RAM.

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd.eu>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/include/configs/CPCI405AB.h b/include/configs/CPCI405AB.h
index 83e9a04..9122cbd 100644
--- a/include/configs/CPCI405AB.h
+++ b/include/configs/CPCI405AB.h
@@ -192,7 +192,7 @@
 #define CONFIG_SYS_PCI_PTM1PCI 0x00000000	/* Host: use this pci address	*/
 #define CONFIG_SYS_PCI_PTM2LA	0xffc00000	/* point to flash		*/
 #define CONFIG_SYS_PCI_PTM2MS	0xffc00001	/* 4MB, enable			*/
-#define CONFIG_SYS_PCI_PTM2PCI 0x04000000	/* Host: use this pci address	*/
+#define CONFIG_SYS_PCI_PTM2PCI (bd->bi_memsize) /* host use this pci address */
 
 #define CONFIG_PCI_4xx_PTM_OVERWRITE	1 /* overwrite PTMx settings by env */