V4L/DVB (10308): uvcvideo: use usb_make_path to report bus info

usb_make_path reports canonical bus info. Use it when reporting bus info
in VIDIOC_QUERYCAP.

Signed-off-by: Thierry MERLE <thierry.merle@free.fr>
Acked-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>