rename CFG_ENV_IS_IN_FLASH in CONFIG_ENV_IS_IN_FLASH

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/configs/PM520.h b/include/configs/PM520.h
index 5e0bb05..4da84ca 100644
--- a/include/configs/PM520.h
+++ b/include/configs/PM520.h
@@ -245,7 +245,7 @@
 /*
  * Environment settings
  */
-#define CFG_ENV_IS_IN_FLASH	1
+#define CONFIG_ENV_IS_IN_FLASH	1
 #define CFG_ENV_SIZE		0x10000
 #define CFG_ENV_SECT_SIZE	0x40000
 #define CONFIG_ENV_OVERWRITE	1