xpedite5200,5370: Use buffered NOR flash writes

Buffered writes are possible on the XPedite5200 and XPedite5370 and greatly
improve NOR flash write speeds

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

include/configs/XPEDITE5200.h

@@ -129,6 +129,7 @@
 #define CONFIG_SYS_FLASH_WRITE_TOUT	500		/* Flash Write Timeout (ms) */
 #define CONFIG_FLASH_CFI_DRIVER
 #define CONFIG_SYS_FLASH_CFI
+#define CONFIG_SYS_FLASH_USE_BUFFER_WRITE
 #define CONFIG_SYS_FLASH_AUTOPROTECT_LIST	{ {0xfff40000, 0xc0000}, \
 						  {0xfbf40000, 0xc0000} }
 #define CONFIG_SYS_MONITOR_BASE	TEXT_BASE	/* start of monitor */

include/configs/XPEDITE5370.h

@@ -137,6 +137,7 @@ extern unsigned long get_board_ddr_clk(unsigned long dummy);
 #define CONFIG_SYS_FLASH_WRITE_TOUT	500		/* Flash Write Timeout (ms) */
 #define CONFIG_FLASH_CFI_DRIVER
 #define CONFIG_SYS_FLASH_CFI
+#define CONFIG_SYS_FLASH_USE_BUFFER_WRITE
 #define CONFIG_SYS_FLASH_AUTOPROTECT_LIST	{ {0xfff40000, 0xc0000}, \
 						  {0xf7f40000, 0xc0000} }
 #define CONFIG_SYS_MONITOR_BASE	TEXT_BASE	/* start of monitor */