vm-virtio: Remove virtio-pci dependency from VirtioDevice

This patch cleans up the VirtioDevice trait. Since some function are PCI
specific and since they are not even used, it makes sense to remove them
from the trait definition.

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

vm-virtio/src/transport/pci_device.rs

@@ -559,22 +559,6 @@ impl PciDevice for VirtioPciDevice {
         // Once the BARs are allocated, the capabilities can be added to the PCI configuration.
         self.add_pci_capabilities(virtio_pci_bar)?;
 
-        // Allocate the device specific BARs.
-        for config in self.device.get_device_bars() {
-            let device_bar_addr = allocator
-                .allocate_mmio_addresses(None, config.get_size(), None)
-                .ok_or_else(|| PciDeviceError::IoAllocationFailed(config.get_size()))?;
-            config.set_address(device_bar_addr.raw_value());
-            let _device_bar = self.configuration.add_pci_bar(&config).map_err(|e| {
-                PciDeviceError::IoRegistrationFailed(device_bar_addr.raw_value(), e)
-            })?;
-            ranges.push((
-                device_bar_addr,
-                config.get_size(),
-                PciBarRegionType::Memory64BitRegion,
-            ));
-        }
-
         Ok(ranges)
     }