ppc4xx: Add CONFIG_PCI_4xx_PTM_OVERWRITE to some esd 4xx boards

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd.eu>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/include/configs/CPCI405.h b/include/configs/CPCI405.h
index f032a8d..fca6de0 100644
--- a/include/configs/CPCI405.h
+++ b/include/configs/CPCI405.h
@@ -171,6 +171,8 @@
 #define CONFIG_SYS_PCI_PTM2MS  0xffc00001      /* 4MB, enable                  */
 #define CONFIG_SYS_PCI_PTM2PCI 0x04000000      /* Host: use this pci address   */
 
+#define CONFIG_PCI_4xx_PTM_OVERWRITE	1 /* overwrite PTMx settings by env */
+
 /*-----------------------------------------------------------------------
  * IDE/ATA stuff
  *-----------------------------------------------------------------------