rename CFG_ENV_IS_IN_NVRAM in CONFIG_ENV_IS_IN_NVRAM

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/configs/mcu25.h b/include/configs/mcu25.h
index d146537..5c234df 100644
--- a/include/configs/mcu25.h
+++ b/include/configs/mcu25.h
@@ -121,7 +121,7 @@
  * Environment
  *----------------------------------------------------------------------*/
 
-#undef	CFG_ENV_IS_IN_NVRAM
+#undef	CONFIG_ENV_IS_IN_NVRAM
 #define CFG_ENV_IS_IN_FLASH
 #undef  CFG_ENV_IS_NOWHERE