qemuDomainAttachNetDevice: pass mq and vectors for vhost-user with multiqueue
    
    Two reasons:
    1.in none hotplug, we will pass it. We can see from libvirt function
    qemuBuildVhostuserCommandLine
    2.qemu will use this vetcor num to init msix table. If we don't pass, qemu
    will use default value, this will cause VM can only use default value
    interrupts at most.
    
    Signed-off-by: gaohaifeng <gaohaifeng.gao@huawei.com>