Generate a macro in the form of LIBCAMERA_HAS_$VENDOR_VENDOR_$MODE_$NAME for each control so that its existence can be checked easily and without extra version checks. Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>