scripts/dts: Fix Copyright headers

One was missing it and the other was not the new format.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>

scripts/dts/devicetree.py

@@ -2,17 +2,7 @@
 #
 # Copyright (c) 2017 Intel Corporation
 #
-# 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-License-Identifier: Apache-2.0
 #
 
 import sys

scripts/dts/extract_dts_includes.py

@@ -1,4 +1,9 @@
 #!/usr/bin/env python3
+#
+# Copyright (c) 2017, Linaro Limited
+#
+# SPDX-License-Identifier: Apache-2.0
+#
 
 # vim: ai:ts=4:sw=4