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/board/rsdproto/flash.c b/board/rsdproto/flash.c
index d9f6b3b..f954458 100644
--- a/board/rsdproto/flash.c
+++ b/board/rsdproto/flash.c
@@ -131,7 +131,7 @@
 		      &flash_info[1]);
 #endif
 
-#if defined(CFG_ENV_IS_IN_FLASH) && defined(CFG_ENV_ADDR)
+#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CFG_ENV_ADDR)
 # ifndef  CFG_ENV_SIZE
 #  define CFG_ENV_SIZE	CFG_ENV_SECT_SIZE
 # endif