qemu: dont set mq=on,vectors=N for virtio-net-device

[sarcasticadmin]

Description

From latest commit off main: c5074bb6d328a6071a70dcb097f8bcd208fce80a

Setting vcpu > 1 for qemu guests would result in the following error during guest startup:

  qemu-system-x86_64: -device virtio-net-device,netdev=host1, \
    mac=02:00:00:00:00:01,mq=on,vectors=6: Property \
    'virtio-net-device.vectors' not found

I believe this is because only virtio-net-pci supports mq and vectors. But its hard to tell from the documentation that I found: https://www.linux-kvm.org/page/Multiqueue#Enable_MQ_feature

VM configuration

My hosts microvm configuration:

{
  microvm.qemu = {
    serialConsole = false;
    extraArgs = [
      "-serial" "pty"
    ];
  };

  microvm = {
    vcpu = 2;
    mem = 4096;
    interfaces = [{
        type = "tap";
        id = "vm-host1";
        mac = "02:00:00:00:00:01";
      }];

    volumes = [{ image = "/persist/microvm/host1.img"; mountPoint = "/persist"; size = 2000; }];
  };
}

[astro]

Thank you very much!