Revert: "linux-v4l2: Save device by id or path"
Origin https://github.com/obsproject/obs-studio/pull/6493 is closed by upstream. And this patch will cause obs crash when adding v4l2 video capture device on rk3588 platform. Details of this issue: https://github.com/obsproject/obs-studio/pull/6493#issuecomment-2409777707