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/MPC8641HPCN.h b/include/configs/MPC8641HPCN.h
index a57c303..170fbd6 100644
--- a/include/configs/MPC8641HPCN.h
+++ b/include/configs/MPC8641HPCN.h
@@ -509,7 +509,7 @@
     #define CFG_ENV_SECT_SIZE		0x10000	/* 64K(one sector) for env */
     #define CFG_ENV_SIZE		0x2000
 #else
-    #define CFG_ENV_IS_NOWHERE	1	/* Store ENV in memory only */
+    #define CONFIG_ENV_IS_NOWHERE	1	/* Store ENV in memory only */
     #define CFG_ENV_ADDR		(CFG_MONITOR_BASE - 0x1000)
     #define CFG_ENV_SIZE		0x2000
 #endif