rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 6b3f60e..93c2243 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -1,12 +1,12 @@
 /*
  * COM1 NS16550 support
  * originally from linux source (arch/ppc/boot/ns16550.c)
- * modified to use CFG_ISA_MEM and new defines
+ * modified to use CONFIG_SYS_ISA_MEM and new defines
  */
 
 #include <config.h>
 
-#ifdef CFG_NS16550
+#ifdef CONFIG_SYS_NS16550
 
 #include <ns16550.h>