Standardize command usage messages with cmd_usage()

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/cpu/ppc4xx/bedbug_405.c b/cpu/ppc4xx/bedbug_405.c
index 5ef5607..ef11cb6 100644
--- a/cpu/ppc4xx/bedbug_405.c
+++ b/cpu/ppc4xx/bedbug_405.c
@@ -71,7 +71,7 @@
 	/* -------------------------------------------------- */
 
 	if (argc < 2) {
-		printf ("Usage:\n%s\n", cmdtp->usage);
+		cmd_usage(cmdtp);
 		return;
 	}
 
@@ -125,7 +125,7 @@
 	/* Set a breakpoint at the address */
 
 	if (!isdigit (argv[1][0])) {
-		printf ("Usage:\n%s\n", cmdtp->usage);
+		cmd_usage(cmdtp);
 		return;
 	}