The intel-ipu3.h header has moved in the v5.14 kernel. Update the kernel headers update script accordingly. While at it, add a missing directory separator to fix a failure when the path to the kernel tree doesn't end with a /. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>