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/pm520/flash.c b/board/pm520/flash.c
index 4301b8c..c899ad3 100644
--- a/board/pm520/flash.c
+++ b/board/pm520/flash.c
@@ -119,7 +119,7 @@
 #endif
 #endif
 
-#ifdef	CFG_ENV_IS_IN_FLASH
+#ifdef	CONFIG_ENV_IS_IN_FLASH
 	flash_protect ( FLAG_PROTECT_SET,
 			CFG_ENV_ADDR,
 			CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0] );