eNET: Fix Flash Write

Onboard AMD Flash chip does not support buffered writes
Signed-off-by: NGraeme Russ <graeme.russ@gmail.com>

include/configs/eNET.h

@@ -198,7 +198,7 @@
 					 CONFIG_SYS_FLASH_BASE_1, \
 					 CONFIG_SYS_FLASH_BASE_2}
 #define CONFIG_SYS_FLASH_EMPTY_INFO
-#define CONFIG_SYS_FLASH_USE_BUFFER_WRITE
+#undef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
 #define CONFIG_SYS_MAX_FLASH_SECT	128	/* max number of sectors on one chip */
 #define CONFIG_SYS_FLASH_CFI_WIDTH	FLASH_CFI_8BIT
 #define CONFIG_SYS_FLASH_LEGACY_512Kx8