ppc4xx: Merge xilinx-ppc440 and xilinx-ppc405 cfg

Xilinx ppc440 and ppc405 have many similarities. This patch merge the
config files of both infrastuctures

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@uam.es>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/avnet/fx12mm/xparameters.h b/board/avnet/fx12mm/xparameters.h
index f7031b3..4410f19 100644
--- a/board/avnet/fx12mm/xparameters.h
+++ b/board/avnet/fx12mm/xparameters.h
@@ -46,6 +46,6 @@
 #define XPAR_DDR2_SDRAM_MEM_BASEADDR 0x00000000
 
 /* FLASH */
-#define XPAR_FLASH_2MX16_MEM0_BASEADDR 0xFFC00000
+#define XPAR_FLASH_MEM0_BASEADDR 0xFFC00000
 
 #endif