rename CFG_ENV macros to CONFIG_ENV

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/configs/atngw100.h b/include/configs/atngw100.h
index 12da7f0..5c28638 100644
--- a/include/configs/atngw100.h
+++ b/include/configs/atngw100.h
@@ -154,8 +154,8 @@
 #define CFG_SDRAM_BASE			EBI_SDRAM_BASE
 
 #define CONFIG_ENV_IS_IN_FLASH		1
-#define CFG_ENV_SIZE			65536
-#define CFG_ENV_ADDR			(CFG_FLASH_BASE + CFG_FLASH_SIZE - CFG_ENV_SIZE)
+#define CONFIG_ENV_SIZE			65536
+#define CONFIG_ENV_ADDR			(CFG_FLASH_BASE + CFG_FLASH_SIZE - CONFIG_ENV_SIZE)
 
 #define CFG_INIT_SP_ADDR		(CFG_INTRAM_BASE + CFG_INTRAM_SIZE)