[ffmpeg/f25] (7 commits) ...Fixup

[nchauvet]

Summary of changes:

  1ccc67b... enable QSV support by default, since libmfx is in Fedora no (*)
  58638f6... QSV is x86 only (*)
  2a81e22... don't try to enable libmfx on non-x86 (*)
  1ed1222... fix copy&paste typo (*)
  5974670... Disable opencv for f25 (*)
  994ba9e... Disable opencv (*)
  ef45b66... Fixup (*)

(*) This commit already existed in another branch; no separate mail sent