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/include/configs/VoVPN-GW.h b/include/configs/VoVPN-GW.h
index db05d82..d8d97e8 100644
--- a/include/configs/VoVPN-GW.h
+++ b/include/configs/VoVPN-GW.h
@@ -259,7 +259,7 @@
 #define CFG_MONITOR_OFFSET		0x00700000
 
 /* environment in flash */
-#define CFG_ENV_IS_IN_FLASH		1
+#define CONFIG_ENV_IS_IN_FLASH		1
 #define CFG_ENV_ADDR			(CFG_FLASH_BASE + 0x00020000)
 #define CFG_ENV_SIZE			0x00020000
 #define CFG_ENV_SECT_SIZE		0x00020000