rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/post/cpu/ppc4xx/watchdog.c b/post/cpu/ppc4xx/watchdog.c
index 7fdecb4..221adfc 100644
--- a/post/cpu/ppc4xx/watchdog.c
+++ b/post/cpu/ppc4xx/watchdog.c
@@ -37,7 +37,7 @@
 
 #include <post.h>
 
-#if CONFIG_POST & CFG_POST_WATCHDOG
+#if CONFIG_POST & CONFIG_SYS_POST_WATCHDOG
 
 #include <watchdog.h>
 
@@ -65,4 +65,4 @@
 	}
 }
 
-#endif /* CONFIG_POST & CFG_POST_WATCHDOG */
+#endif /* CONFIG_POST & CONFIG_SYS_POST_WATCHDOG */