ffmpeg: upgrade 4.3.1 -> 4.3.2

Remove 2 patches that are included in the n4.3.2 tag.
The commits were cherry-picked back to the 4.3 branch so they
have different commit ids than in the patches:

6d886b6586 lavf/srt: fix build fail when used the libsrt 1.4.1
a53ffb15d8 avcodec/exr: Check ymin vs. h
4f0bdff292 avformat/vividas: improve extradata packing checks in track_header()

Signed-off-by: Randy MacLeod <Randy.MacLeod@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>