rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/lib_ppc/time.c b/lib_ppc/time.c
index f093a57..173ffab 100644
--- a/lib_ppc/time.c
+++ b/lib_ppc/time.c
@@ -89,7 +89,7 @@
 int init_timebase (void)
 {
 #if defined(CONFIG_5xx) || defined(CONFIG_8xx)
-	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+	volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
 
 	/* unlock */
 	immap->im_sitk.sitk_tbk = KAPWR_KEY;