Makefile: Keep header consistent

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>
Signed-off-by: shettygururaj <gururaj.shetty@huawei.com>

Makefile

-# SPDX-License-Identifier: Apache-2.0
 # SPDX-FileCopyrightText: Huawei Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 BUILD_DIR ?= build