Backport of "decklink: reset calculation of time_mapping to fix clipping HDMI video" into 1.20
Backport of !3132 (merged) "decklink: reset calculation of time_mapping to fix clipping HDMI video".
Commits:
- b618ff33 decklink: reset calculation of gst_decklink_video_src_update_time_mapping on no_signal. When the HDMI cable was disconnected for a long time, the calculation took too much time. SDI cable works fine.