versatile: board configs: Use buffered writes on flash

This patch provides a support to use buffered writes on flash
for versatile and vexpress boards.

This will certainly increase the flash writes.

Signed-off-by: Jagannadha Sutradharudu Teki <402jagan@gmail.com>

include/configs/ca9x4_ct_vxp.h

@@ -163,6 +163,8 @@
 /* Room required on the stack for the environment data */
 #define CONFIG_ENV_SIZE			FLASH_MAX_SECTOR_SIZE
 
+#define CONFIG_SYS_FLASH_USE_BUFFER_WRITE /* use buffered writes */
+
 /*
  * Amount of flash used for environment:
  * We don't know which end has the small erase blocks so we use the penultimate

include/configs/versatile.h

@@ -230,6 +230,7 @@
 #define CONFIG_SYS_FLASH_PROTECTION	/* The devices have real protection */
 #define CONFIG_SYS_FLASH_EMPTY_INFO	/* flinfo indicates empty blocks */
 
+#define CONFIG_SYS_FLASH_USE_BUFFER_WRITE /* use buffered writes */
 #endif
 
 #endif	/* __CONFIG_H */