Added the SPDX license identifier based on the following output from the
licensee tool for bios bits:

$ licensee detect bits/
License:        NOASSERTION
Matched files:  COPYING
COPYING:
  Content hash:  7a1fdfa894728ea69588977442c92073aad69e50
  License:       NOASSERTION
  Closest non-matching licenses:
    BSD-3-Clause-Clear similarity:  85.82%
    BSD-4-Clause similarity:        83.69%
    BSD-3-Clause similarity:        77.27%

Signed-off-by: Ani Sinha <ani@anisinha.ca>
---
 tests/pytest/acpi-bits/bits-tests/smilatency.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tests/pytest/acpi-bits/bits-tests/smilatency.py b/tests/pytest/acpi-bits/bits-tests/smilatency.py
index fb1b7228e3..9b11623b2d 100644
--- a/tests/pytest/acpi-bits/bits-tests/smilatency.py
+++ b/tests/pytest/acpi-bits/bits-tests/smilatency.py
@@ -1,6 +1,8 @@
 # Copyright (c) 2015, Intel Corporation
 # All rights reserved.
 #
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+#
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are met:
 #
-- 
2.25.1