These flags are already provided by the function
'get_ffmpeg_config_options'. In the current we pass them again
explicitly during FFmpeg configuration.
This patch makes us rely on the function's return value.
Pick-to: 6.8
Change-Id: I4b257331cedafd7241df4360694e4ad1637267fe
Reviewed-by: Artem Dyomin <artem.dyomin@qt.io>
(cherry picked from commit 16af59b8ac)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
cce1fcb986