board/freescale:Remove use of CONFIG_SPL_NAND_MINIMAL

CONFIG_SPL_NAND_MINIMAL should not be used as it was defined for temporary
review purpose.

So, use CONFIG_SPL_NAND_BOOT config.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
diff --git a/include/configs/BSC9131RDB.h b/include/configs/BSC9131RDB.h
index 4aed5af..584aba8 100644
--- a/include/configs/BSC9131RDB.h
+++ b/include/configs/BSC9131RDB.h
@@ -29,7 +29,7 @@
 #define CONFIG_SPL_INIT_MINIMAL
 #define CONFIG_SPL_SERIAL_SUPPORT
 #define CONFIG_SPL_NAND_SUPPORT
-#define CONFIG_SPL_NAND_MINIMAL
+#define CONFIG_SPL_NAND_BOOT
 #define CONFIG_SPL_FLUSH_IMAGE
 #define CONFIG_SPL_TARGET		"u-boot-with-spl.bin"