NAND: Fix warning Please define CONFIG_SYS_64BIT_VSPRINTF...

Commit 8d2effea added a warning for configurations that use NAND
without defining the (then necessary) CONFIG_SYS_64BIT_VSPRINTF but
failed to fix the affected boards.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/include/configs/IDS8247.h b/include/configs/IDS8247.h
index 51e012c..4c4af05 100644
--- a/include/configs/IDS8247.h
+++ b/include/configs/IDS8247.h
@@ -265,6 +265,8 @@
 #define CONFIG_SYS_NAND0_BASE 0xE1000000
 #define CONFIG_SYS_MAX_NAND_DEVICE     1       /* Max number of NAND devices           */
 
+#define CONFIG_SYS_64BIT_VSPRINTF		/* needed for nand_util.c */
+
 #endif /* CONFIG_CMD_NAND */
 
 /*-----------------------------------------------------------------------