rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/serial.h b/include/serial.h
index 2b99e53..e3d8b36 100644
--- a/include/serial.h
+++ b/include/serial.h
@@ -27,12 +27,12 @@
     defined(CONFIG_MPC5xxx)
 extern struct serial_device serial0_device;
 extern struct serial_device serial1_device;
-#if defined(CFG_NS16550_SERIAL)
+#if defined(CONFIG_SYS_NS16550_SERIAL)
 extern struct serial_device eserial1_device;
 extern struct serial_device eserial2_device;
 extern struct serial_device eserial3_device;
 extern struct serial_device eserial4_device;
-#endif /* CFG_NS16550_SERIAL */
+#endif /* CONFIG_SYS_NS16550_SERIAL */
 
 #endif