Update missing kernel-doc annotations and fix of related warnings at 'make htmldocs'. Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com> Link: https://lore.kernel.org/r/20200408231013.28370-1-l.rubusch@gmail.com [fix indentation, attribute references] Signed-off-by: Johannes Berg <johannes.berg@intel.com>