v4l2_match_dv_timings — do two timings match?
|const struct v4l2_dv_timings * measured,|
|const struct v4l2_dv_timings * standard,|
the measured timings data.
the timings according to the standard.
maximum delta in Hz between standard->pixelclock and the measured timings.
if true, then fail if V4L2_DV_FL_REDUCED_FPS does not match.