[media] timblogiw: fix querycap

Don't set version (the core does that for you), fill in device_caps and
prefix bus_info with "platform:".

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Richard Röjfors <richard.rojfors@pelagicore.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>