Merge pull request #36699 from knedlsepp/fix-mpv-on-darwin

mpv: fix darwin build

pkgs/top-level/all-packages.nix

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     dvdreadSupport     = !stdenv.isDarwin;
     dvdnavSupport      = !stdenv.isDarwin;
     drmSupport         = !stdenv.isDarwin;
+    vaapiSupport       = !stdenv.isDarwin;
     x11Support         = !stdenv.isDarwin;
     xineramaSupport    = !stdenv.isDarwin;
     xvSupport          = !stdenv.isDarwin;