rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/doc/README.MBX b/doc/README.MBX
index 679228e..c889fe9 100644
--- a/doc/README.MBX
+++ b/doc/README.MBX
@@ -1,4 +1,4 @@
-IMPORTANT NOTE - read before defining CFG_USE_OSCCLK in your board
+IMPORTANT NOTE - read before defining CONFIG_SYS_USE_OSCCLK in your board
 		 config file!!!
 
 
@@ -62,7 +62,7 @@
 serial ports to do so.
 
 
-You may have a legitimate need to define CFG_USE_OSCCLK if your
+You may have a legitimate need to define CONFIG_SYS_USE_OSCCLK if your
 MBX8xx board is using the OSCM clocking mode.
 
 You better know what you are doing here.