Standardize command usage messages with cmd_usage()

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/common/cmd_eeprom.c b/common/cmd_eeprom.c
index 2451bef..c59227d 100644
--- a/common/cmd_eeprom.c
+++ b/common/cmd_eeprom.c
@@ -104,7 +104,7 @@
 		}
 	}
 
-	printf ("Usage:\n%s\n", cmdtp->usage);
+	cmd_usage(cmdtp);
 	return 1;
 }
 #endif