rename CFG_ENV_IS_IN_NAND in CONFIG_ENV_IS_IN_NAND

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/configs/delta.h b/include/configs/delta.h
index 1db962a..5a5240e 100644
--- a/include/configs/delta.h
+++ b/include/configs/delta.h
@@ -262,7 +262,7 @@
 
 #define CFG_NO_FLASH		1
 
-#define CFG_ENV_IS_IN_NAND	1
+#define CONFIG_ENV_IS_IN_NAND	1
 #define CFG_ENV_OFFSET		0x40000
 #define CFG_ENV_OFFSET_REDUND	0x44000
 #define CFG_ENV_SIZE		0x4000