da850evm: setup NAND support under CONFIG_USE_NAND

The current da850evm config is missing the pieces for NAND support that can be
found in Sandeep's u-boot-davinci tree [1].

This patch adds NAND support in the spirit of the support in the u-boot-davinci
tree where NAND support for the da850evm can be enabled by putting a single
'#define CONFIG_USE_NAND' at the top of the include/configs/da850evm.h file.

[1] http://arago-project.org/git/people/?p=sandeep/u-boot-davinci.git;a=tree

Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

include/configs/da850evm.h

@@ -78,6 +78,29 @@
 #define CONFIG_SYS_I2C_SPEED		25000
 #define CONFIG_SYS_I2C_SLAVE		10 /* Bogus, master-only in U-Boot */
 
+/*
+ * Flash & Environment
+ */
+#ifdef CONFIG_USE_NAND
+#undef CONFIG_ENV_IS_IN_FLASH
+#define CONFIG_NAND_DAVINCI
+#define CONFIG_SYS_NO_FLASH
+#define CONFIG_ENV_IS_IN_NAND		/* U-Boot env in NAND Flash  */
+#define CONFIG_ENV_OFFSET		0x0 /* Block 0--not used by bootcode */
+#define CONFIG_ENV_SIZE			(128 << 10)
+#define	CONFIG_SYS_NAND_USE_FLASH_BBT
+#define CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST
+#define	CONFIG_SYS_NAND_PAGE_2K
+#define CONFIG_SYS_NAND_CS		3
+#define CONFIG_SYS_NAND_BASE		DAVINCI_ASYNC_EMIF_DATA_CE3_BASE
+#define CONFIG_SYS_CLE_MASK		0x10
+#define CONFIG_SYS_ALE_MASK		0x8
+#undef CONFIG_SYS_NAND_HW_ECC
+#define CONFIG_SYS_MAX_NAND_DEVICE	1 /* Max number of NAND devices */
+#define NAND_MAX_CHIPS			1
+#define DEF_BOOTM			""
+#endif
+
 /*
  * U-Boot general configuration
  */
@@ -127,6 +150,12 @@
 #undef CONFIG_CMD_PING
 #endif
 
+#ifdef CONFIG_USE_NAND
+#undef CONFIG_CMD_FLASH
+#undef CONFIG_CMD_IMLS
+#define CONFIG_CMD_NAND
+#endif
+
 #if !defined(CONFIG_USE_NAND) && \
 	!defined(CONFIG_USE_NOR) && \
 	!defined(CONFIG_USE_SPIFLASH)