Add licence

Signed-off-by: Wenhao Lin <wenhao.lin@amd.com>

src/com/xilinx/rapidwright/router/VersalClockRouting.java

@@ -1,3 +1,25 @@
+/*
+ * Copyright (c) 2024, Advanced Micro Devices, Inc.
+ * All rights reserved.
+ *
+ * Author: Wenhao Lin, AMD Research and Advanced Development.
+ *
+ * This file is part of RapidWright.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
 package com.xilinx.rapidwright.router;
 
 import com.xilinx.rapidwright.design.Design;