rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/post/lib_ppc/twox.c b/post/lib_ppc/twox.c
index 519b432..d6714f9 100644
--- a/post/lib_ppc/twox.c
+++ b/post/lib_ppc/twox.c
@@ -38,7 +38,7 @@
 #include <post.h>
 #include "cpu_asm.h"
 
-#if CONFIG_POST & CFG_POST_CPU
+#if CONFIG_POST & CONFIG_SYS_POST_CPU
 
 extern void cpu_post_exec_21 (ulong *code, ulong *cr, ulong *res, ulong op1);
 extern ulong cpu_post_makecr (long v);