virtio-queue: Move to upstream crate from rust-vmm

Now that all the preliminary work has been merged to make Cloud
Hypervisor work with the upstream crate virtio-queue from
rust-vmm/vm-virtio repository, we can move the whole codebase and remove
the local copy of the virtio-queue crate.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

virtio-devices/src/transport/pci_device.rs

@@ -29,7 +29,7 @@ use std::sync::atomic::{AtomicBool, AtomicU16, AtomicUsize, Ordering};
 use std::sync::{Arc, Barrier, Mutex};
 use versionize::{VersionMap, Versionize, VersionizeResult};
 use versionize_derive::Versionize;
-use virtio_queue::{defs::VIRTQ_MSI_NO_VECTOR, Error as QueueError, Queue};
+use virtio_queue::{Error as QueueError, Queue};
 use vm_allocator::{AddressAllocator, SystemAllocator};
 use vm_device::interrupt::{
     InterruptIndex, InterruptManager, InterruptSourceGroup, MsiIrqGroupConfig,
@@ -42,6 +42,9 @@ use vm_migration::{
 use vm_virtio::AccessPlatform;
 use vmm_sys_util::{errno::Result, eventfd::EventFd};
 
+/// Vector value used to disable MSI for a queue.
+const VIRTQ_MSI_NO_VECTOR: u16 = 0xffff;
+
 #[derive(Debug)]
 enum Error {
     /// Failed to retrieve queue ring's index.