ffmpeg:
 * bump version to 1.2.1
 * remove redundant --disable-dxva2 configure option, --disable-hwaccels disables all hardware accelerators - also the dxva2 one


git-svn-id: file:///var/svn/freetz/trunk@10503 149334a1-2f27-0410-a3b9-fc62619ac1e6