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/QS860T.h b/include/configs/QS860T.h
index 9dfceef..dd79246 100644
--- a/include/configs/QS860T.h
+++ b/include/configs/QS860T.h
@@ -213,7 +213,7 @@
 #define CFG_FLASH_ERASE_TOUT	120000		/* Timeout for Flash Erase (in ms) */
 #define CFG_FLASH_WRITE_TOUT	500		/* Timeout for Flash Write (in ms) */
 
-#undef	CFG_ENV_IS_IN_FLASH
+#undef	CONFIG_ENV_IS_IN_FLASH
 
 /*-----------------------------------------------------------------------
  * Cache Configuration