* 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/wepep250/flash.c b/board/wepep250/flash.c
index 319dddc..5c9d346 100644
--- a/board/wepep250/flash.c
+++ b/board/wepep250/flash.c
@@ -135,7 +135,7 @@
 
 	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,