rename CFG_ENV_IS_NOWHERE in CONFIG_ENV_IS_NOWHERE

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/common/env_common.c b/common/env_common.c
index 36c46f0..c3946f0 100644
--- a/common/env_common.c
+++ b/common/env_common.c
@@ -246,7 +246,7 @@
 #endif
 
 	if (gd->env_valid == 0) {
-#if defined(CONFIG_GTH)	|| defined(CFG_ENV_IS_NOWHERE)	/* Environment not changable */
+#if defined(CONFIG_GTH)	|| defined(CONFIG_ENV_IS_NOWHERE)	/* Environment not changable */
 		puts ("Using default environment\n\n");
 #else
 		puts ("*** Warning - bad CRC, using default environment\n\n");