vmm: config: Extend CpusConfig to add the topology

This allows the user to optionally specify the desired CPU topology. All
parts of the topology must be specified and the product of all parts
must match the maximum vCPUs.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>

src/main.rs

@@ -487,6 +487,7 @@ mod unit_tests {
                 cpus: CpusConfig {
                     boot_vcpus: 1,
                     max_vcpus: 1,
+                    topology: None,
                 },
                 memory: MemoryConfig {
                     size: 536_870_912,