rename CFG_ENV_IS_NOWHERE in CONFIG_ENV_IS_NOWHERE

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/configs/mcu25.h b/include/configs/mcu25.h
index 5c234df..35ecc65 100644
--- a/include/configs/mcu25.h
+++ b/include/configs/mcu25.h
@@ -123,7 +123,7 @@
 
 #undef	CONFIG_ENV_IS_IN_NVRAM
 #define CFG_ENV_IS_IN_FLASH
-#undef  CFG_ENV_IS_NOWHERE
+#undef  CONFIG_ENV_IS_NOWHERE
 
 #ifdef  CONFIG_ENV_IS_IN_EEPROM
 /* Put the environment after the SDRAM configuration */