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

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