mpc831xerdb: enable mtdparts for NAND

The default partition table matches the .dts files for these boards in
Linux.  This allows these partitions to be used by name with U-Boot's
"nand" command.
Signed-off-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>

include/configs/MPC8313ERDB.h

 /*
- * Copyright (C) Freescale Semiconductor, Inc. 2006.
+ * Copyright (C) Freescale Semiconductor, Inc. 2006, 2010.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -232,6 +232,13 @@
 #define CONFIG_SYS_NAND_BASE		0xE2800000
 #endif
 
+#define CONFIG_MTD_DEVICE
+#define CONFIG_MTD_PARTITION
+#define CONFIG_CMD_MTDPARTS
+#define MTDIDS_DEFAULT			"nand0=e2800000.flash"
+#define MTDPARTS_DEFAULT 		\
+	"mtdparts=e0600000.flash:512k(uboot),128k(env),3m@1m(kernel),-(fs)"
+
 #define CONFIG_SYS_MAX_NAND_DEVICE	1
 #define CONFIG_MTD_NAND_VERIFY_WRITE
 #define CONFIG_CMD_NAND 1

include/configs/MPC8315ERDB.h

 /*
- * Copyright (C) 2007-2009 Freescale Semiconductor, Inc.
+ * Copyright (C) 2007-2010 Freescale Semiconductor, Inc.
  *
  * Dave Liu <daveliu@freescale.com>
  *
@@ -243,6 +243,13 @@
 #define CONFIG_SYS_NAND_BASE		0xE0600000
 #endif
 
+#define CONFIG_MTD_DEVICE
+#define CONFIG_MTD_PARTITION
+#define CONFIG_CMD_MTDPARTS
+#define MTDIDS_DEFAULT			"nand0=e0600000.flash"
+#define MTDPARTS_DEFAULT 		\
+	"mtdparts=e0600000.flash:512k(uboot),128k(env),3m@1m(kernel),-(fs)"
+
 #define CONFIG_SYS_MAX_NAND_DEVICE	1
 #define CONFIG_MTD_NAND_VERIFY_WRITE	1
 #define CONFIG_CMD_NAND			1