Bulk SPDX copyright notice addition.

Cleanup make lint-reuse (lint-license) complaints.

Signed-off-by: Joey Armstrong <jarmstrong@linuxfoundation.org>
Change-Id: Ic199c6e6c3f51789b2f91e534e7668b77b567f7d
diff --git a/makefiles/lint/yaml/find_utils.mk b/makefiles/lint/yaml/find_utils.mk
index 49d4cb0..dcb1842 100644
--- a/makefiles/lint/yaml/find_utils.mk
+++ b/makefiles/lint/yaml/find_utils.mk
@@ -1,5 +1,22 @@
 # -*- makefile -*-
 # -----------------------------------------------------------------------
+# Copyright 2023-2024 Open Networking Foundation Contributors
+#
+# 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.
+# -----------------------------------------------------------------------
+# SPDX-FileCopyrightText: 2023-2024 Open Networking Foundation Contributors
+# SPDX-License-Identifier: Apache-2.0
+# -----------------------------------------------------------------------
 # Intent:
 #   o Construct a find command able to gather python files with filtering.
 #   o Used by library makefiles flake8.mk and pylint.mk for iteration.