OMAP3: igep00x0: add CONFIG_SPL_BOARD_INIT for CONFIG_SPL_NAND_SUPPORT

When booting an IGEPv2 board from NAND with SPL, U-Boot hangs
trying to read the OMAP General Purpose Memory Controller (GPMC).

The reason is that the GPMC initialization function is called
inside spl_board_init() and this function is only executed when
CONFIG_SPL_BOARD_INIT is defined.
Signed-off-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Acked-by: NEnric Balletbo i Serra <eballetbo@iseebcn.com>

include/configs/igep00x0.h

@@ -312,6 +312,7 @@
 #define CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION	1
 #define CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME	"u-boot.img"
 
+#define CONFIG_SPL_BOARD_INIT
 #define CONFIG_SPL_LIBCOMMON_SUPPORT
 #define CONFIG_SPL_LIBDISK_SUPPORT
 #define CONFIG_SPL_I2C_SUPPORT