These for-loops should test against v4l2_dv_timings_presets[i].bt.width,
not if i < v4l2_dv_timings_presets[i].bt.width. Luckily nothing ever broke,
since the smallest width is still a lot higher than the total number of
presets, but it is wrong.

The last item in the presets array is all 0, so the for-loop must stop
when it reaches that sentinel.
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: NKrzysztof Hałasa <khalasa@piap.pl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+huawei@kernel.org>