[media] solo6x10: fix querycap and update driver version

Setup correct bus_info, let the v4l2 core set the version and add device_caps
support.
Also update the module version to 3.0.0 since this is a major upgrade.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>