fs:fat: fix set file name function

Curently memcpy copies string without null terminating char because
function strlen returns only number of characters excluding
null terminating character. Replace memcpy with strcpy.

Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
CC: Tom Rini <trini@ti.com>

fs/fat/fat_write.c

@@ -57,7 +57,7 @@ static void set_name(dir_entry *dirent, const char *filename)
 	if (len == 0)
 		return;
 
-	memcpy(s_name, filename, len);
+	strcpy(s_name, filename);
 	uppercase(s_name, len);
 
 	period = strchr(s_name, '.');