[util] Set dxgi.syncInterval to 0 for Earth Defense Force 5

[junglerobba]

The game stutters heavily with vsync enabled, even on windows, and
offers no option to disable it.

Tested on Wayland (sway) and xorg (Plasma) with both 60 and 144 Hz, and got the same behavior in all cases.
Tbf, I don't know if this is really "just" normal stutter or whatever the game is doing, since MangoHud does not even show the framerate correctly.
Either way, setting dxgi.syncInterval to 0 makes the game run fine again.

[aufkrawall]

Did you try dxgi.numBackBuffers = 3 with dxgi.syncInterval = 1 and RADV?

Edit: Judging by your pictures, I'd assume that game locks fps at 60 and thus starves vsync backbuffer queue (which would be extremely dumb), which also only has 2 frames. In that case, the spikes would disappear with dxgi.numBackBuffers = 3 and RADV, but it would still stutter periodically. You'd need a refresh rate below 60Hz or VRR to make it run with proper presentation.

[doitsujin]

This isn't really a solution, if there's a performance issue with the game then we should try to find the root cause. Would be nice to have an apitrace or something to see what it's doing.