virtio-devices: Add a VirtioDevice reference to VirtioPciCommonConfig

Replace the stored AccessPlatform reference with one to the
VirtioDevice. By doing this not only does it allow the code to be
simplified but also now makes it virtio spec compliant by only
translating via the access platform if the feature is acknowledged.

Signed-off-by: Rob Bradford <rbradford@meta.com>

vmm/src/device_manager.rs

@@ -4405,7 +4405,7 @@ impl DeviceManager {
                 memory,
                 virtio_device,
                 msix_num,
-                access_platform,
+                access_platform.as_ref(),
                 self.msi_interrupt_manager.as_ref(),
                 pci_device_bdf.into(),
                 self.activate_evt