The libcamera git history contains numerous examples of incorrect commit
message trailers due to invalid trailer types (e.g. Change-Id), typos
and other small issues. Those went unnoticed through reviews, which
shows that an automated checker is required.
Add a trailers checker to checkstyle.py to catch invalid or malformed
trailers, with a set of supported trailers that match libcamera's commit
message practices. New trailer keys can easily be added later as new
needs arise.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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