Fix missing copyright notices.

test/ck_tile/gemm_streamk/test_gemm_streamk_reboot_util.cpp

@@ -1,3 +1,6 @@
+// Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
+// SPDX-License-Identifier: MIT
+
 #include "test_gemm_streamk_reboot_util.hpp"
 
 ck_tile::index_t get_cu_count()

test/ck_tile/gemm_tile_engine/extract_test_params.py

@@ -1,5 +1,8 @@
 #!/usr/bin/env python3
 
+# Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
+# SPDX-License-Identifier: MIT
+
 import json
 import argparse
 import os

test/ck_tile/grouped_gemm_quant/test_grouped_gemm_quant_ut_cases.inc

@@ -1,3 +1,6 @@
+// Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
+// SPDX-License-Identifier: MIT
+
 #pragma once
 
 TYPED_TEST(TEST_CLASS_NAME, Basic)