staging: media: tegra-video: remove unneeded include

There is only a pointer reference to struct tegra_vi in video.h, thus vi.h
is not needed.

Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>