kerneltrap.org no longer works, update to a working reference
Signed-off-by: NPranith Kumar <bobby.prani@gmail.com>
Acked-by: NAlexey Klimov <klimov.linux@gmail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>