rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/doc/README.serial_multi b/doc/README.serial_multi
index 40f7815..ad61d42 100644
--- a/doc/README.serial_multi
+++ b/doc/README.serial_multi
@@ -35,7 +35,7 @@
 	setenv sout serial_scc; setenv baudrate 38400
 
 After that press 'enter' at the SCC console. Note that baudrates <38400
-are not allowed on LWMON with watchdog enabled (see CFG_BAUDRATE_TABLE in
+are not allowed on LWMON with watchdog enabled (see CONFIG_SYS_BAUDRATE_TABLE in
 include/configs/lwmon.h).