Standardize command usage messages with cmd_usage()

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/common/cmd_reiser.c b/common/cmd_reiser.c
index 4f4117e..a2f2286 100644
--- a/common/cmd_reiser.c
+++ b/common/cmd_reiser.c
@@ -57,7 +57,7 @@
 	int part_length;
 
 	if (argc < 3) {
-		printf ("Usage:\n%s\n", cmdtp->usage);
+		cmd_usage(cmdtp);
 		return 1;
 	}
 	dev = (int)simple_strtoul (argv[2], &ep, 16);
@@ -150,7 +150,7 @@
 		break;
 
 	default:
-		printf ("Usage:\n%s\n", cmdtp->usage);
+		cmd_usage(cmdtp);
 		return 1;
 	}