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/board/LEOX/elpt860/README.LEOX b/board/LEOX/elpt860/README.LEOX
index 9052b09..25524af 100644
--- a/board/LEOX/elpt860/README.LEOX
+++ b/board/LEOX/elpt860/README.LEOX
@@ -106,7 +106,7 @@
 ?       - alias for 'help'
 
 ##################################################
-# Environment Variables (CFG_ENV_IS_IN_NVRAM)
+# Environment Variables (CONFIG_ENV_IS_IN_NVRAM)
 ##############################
 
 LEOX_elpt860: printenv