Revert "Fix ac3 audio playback if aac track is present"

This reverts commit 3a8c1716975f15e0fdf6dd0cb11d617a8ea1374a.

the issue has been fixed upstream:
https://schwerkraft.elitedvb.net/plugins/scmgit/cgi-bin/gitweb.cgi?p=dvbmediasink/dvbmediasink.git;a=commit;h=91738211ef106ae7d14c1ccc5c4dd26c0f2dbf58
gst-plugin-dreambox-dvbmediasink: bump PR
Merge remote-tracking branch 'openpli3/master' into HEAD