tests/functional: Correct typo in test_netdev_ethtool.py SPDX tag

Cc: Alex Bennée <alex.bennee@linaro.org>
Fixes: 9f95111474 ("tests/avocado: re-factor igb test to avoid timeouts")
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

tests/functional/test_netdev_ethtool.py

@@ -5,7 +5,7 @@
 # This test leverages ethtool's --test sequence to validate network
 # device behaviour.
 #
-# SPDX-License-Identifier: GPL-2.0-or-late
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 from unittest import skip
 from qemu_test import QemuSystemTest, Asset