AT91 CPU9260 CPU9G20 Fix compile warnings

This change fixes the compiler warning

nand_util.c:45:2: warning: #warning Please define CONFIG_SYS_64BIT_VSPRINTF
  for correct output!

Signed-off-by: Eric Benard <eric@eukrea.com>
Signed-off-by: Tom Rix <Tom.Rix@windriver.com>

include/configs/cpu9260.h

@@ -295,6 +295,7 @@
 #define CONFIG_SYS_NAND_ENABLE_PIN		AT91_PIN_PC14
 #define CONFIG_SYS_NAND_MASK_ALE		(1 << 21)
 #define CONFIG_SYS_NAND_MASK_CLE		(1 << 22)
+#define CONFIG_SYS_64BIT_VSPRINTF		/* needed for nand_util.c */
 
 /* NOR flash */
 #define CONFIG_SYS_FLASH_CFI			1