* Get (mostly) rid of CFG_MONITOR_LEN definition; compute real length
  instead CFG_MONITOR_LEN is now only used to determine  _at_compile_
  _time_  (!) if the environment is embedded within the U-Boot image,
  or in a separate flash sector.

* Cleanup CFG_DER #defines in config files (wd maintained only)
diff --git a/board/cradle/flash.c b/board/cradle/flash.c
index 265b609..463026d 100644
--- a/board/cradle/flash.c
+++ b/board/cradle/flash.c
@@ -73,7 +73,7 @@
     */
    flash_protect(FLAG_PROTECT_SET,
                   CFG_FLASH_BASE,
-                  CFG_FLASH_BASE + _armboot_end_data - _armboot_start,
+                  CFG_FLASH_BASE + monitor_flash_len - 1,
                   &flash_info[0]);
 
    flash_protect(FLAG_PROTECT_SET,