rename CFG_ENV macros to CONFIG_ENV

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/board/exbitgen/flash.c b/board/exbitgen/flash.c
index 4d83fd5..745fba2 100644
--- a/board/exbitgen/flash.c
+++ b/board/exbitgen/flash.c
@@ -126,10 +126,10 @@
 #endif
 #endif
 
-#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CFG_ENV_ADDR)
+#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
 	flash_protect(FLAG_PROTECT_SET,
-		CFG_ENV_ADDR,
-		CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
+		CONFIG_ENV_ADDR,
+		CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
 		&flash_info[0]);
 #endif