Replace the GPLv2 boilerplate text with a nice and short
SPDX header.
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Link: https://lore.kernel.org/r/20230705212231.631525-1-sre@kernel.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>