Standardize command usage messages with cmd_usage()

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/cpu/mpc8xx/bedbug_860.c b/cpu/mpc8xx/bedbug_860.c
index 5d52366..0308bbb 100644
--- a/cpu/mpc8xx/bedbug_860.c
+++ b/cpu/mpc8xx/bedbug_860.c
@@ -71,7 +71,7 @@
 
   if (argc < 2)
   {
-    printf ("Usage:\n%s\n", cmdtp->usage);
+    cmd_usage(cmdtp);
     return;
   }
 
@@ -122,7 +122,7 @@
 
   if( !isdigit( argv[ 1 ][ 0 ]))
   {
-    printf ("Usage:\n%s\n", cmdtp->usage);
+    cmd_usage(cmdtp);
     return;
   }