Documentation: coding-style: Clean up header guard style

Header guards were replaced by pragma once calls with commits
0a64cf8b7645 ("libcamera: Convert to pragma once") through to
796210ecea82 ("v4l2: Convert to pragma once")

Update the coding style to reflect the updated header guard style.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

0 files changed, 0 insertions, 0 deletions