rename CFG_ENV_IS_IN_FLASH in CONFIG_ENV_IS_IN_FLASH

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/board/o2dnt/flash.c b/board/o2dnt/flash.c
index 349086f..2aa0489 100644
--- a/board/o2dnt/flash.c
+++ b/board/o2dnt/flash.c
@@ -103,7 +103,7 @@
 			flash_get_info(CFG_MONITOR_BASE));
 #endif
 
-#ifdef	CFG_ENV_IS_IN_FLASH
+#ifdef	CONFIG_ENV_IS_IN_FLASH
 	/* ENV protection ON by default */
 	flash_protect(FLAG_PROTECT_SET,
 			CFG_ENV_ADDR,