hw/net/vmxnet3: Do not abort QEMU if guest specified bad queue numbers

QEMU should never terminate unexpectedly just because the guest is
doing something wrong like specifying wrong queue numbers. Let's
simply refuse to set the device active in this case.

Buglink: https://bugs.launchpad.net/qemu/+bug/1890160


Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>