V4L/DVB: uvcvideo: Increase the streaming control timeout to 5 seconds

This fixes timeout issues with some Logitech webcams. The timeout value
seems to match the one used in the Logitech Windows driver, so no
further increase should be necessary.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>