da850evm: Use generic board and libfdt, fix size for SPI flash

Add defines to use CONFIG_SYS_GENERIC_BOARD and CONFIG_OF_LIBFDT.
Semi-separate to this: the size of the image for the da850evm has
increased to the point that the size in da850evm.h and the offset for
the environment in SPI flash no longer work.  They are modified to
account for the larger image size.

Signed-off-by: Peter Howard <phoward@gme.net.au>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>

include/configs/da850evm.h

@@ -157,7 +157,7 @@
 #define CONFIG_SPL_SPI_FLASH_SUPPORT
 #define CONFIG_SPL_SPI_LOAD
 #define CONFIG_SYS_SPI_U_BOOT_OFFS	0x8000
-#define CONFIG_SYS_SPI_U_BOOT_SIZE	0x30000
+#define CONFIG_SYS_SPI_U_BOOT_SIZE	0x40000
 #endif
 
 /*
@@ -251,7 +251,7 @@
 #undef CONFIG_ENV_IS_IN_NAND
 #define CONFIG_ENV_IS_IN_SPI_FLASH
 #define CONFIG_ENV_SIZE			(64 << 10)
-#define CONFIG_ENV_OFFSET		(256 << 10)
+#define CONFIG_ENV_OFFSET		(512 << 10)
 #define CONFIG_ENV_SECT_SIZE		(64 << 10)
 #define CONFIG_SYS_NO_FLASH
 #endif
@@ -259,6 +259,7 @@
 /*
  * U-Boot general configuration
  */
+#define CONFIG_SYS_GENERIC_BOARD
 #define CONFIG_MISC_INIT_R
 #define CONFIG_BOARD_EARLY_INIT_F
 #define CONFIG_BOOTFILE		"uImage" /* Boot file name */
@@ -275,6 +276,7 @@
 #define CONFIG_SYS_LONGHELP
 #define CONFIG_CRC32_VERIFY
 #define CONFIG_MX_CYCLIC
+#define CONFIG_OF_LIBFDT
 
 /*
  * Linux Information