rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/post/cpu/mpc8xx/cache_8xx.S b/post/cpu/mpc8xx/cache_8xx.S
index a3fc39b..097eedb 100644
--- a/post/cpu/mpc8xx/cache_8xx.S
+++ b/post/cpu/mpc8xx/cache_8xx.S
@@ -33,7 +33,7 @@
 #include <ppc_defs.h>
 #include <asm/cache.h>
 
-#if CONFIG_POST & CFG_POST_CACHE
+#if CONFIG_POST & CONFIG_SYS_POST_CACHE
 
 	.text
 
@@ -490,4 +490,4 @@
 	blr
 
 #endif /* CONFIG_MPC823 || MPC850 || MPC855 || MPC860 */
-#endif /* CONFIG_POST & CFG_POST_CACHE */
+#endif /* CONFIG_POST & CONFIG_SYS_POST_CACHE */