hypervisor: vmm: passing nested argument from VMM to hypervisor

This patch connects the VMM and hypervisor to fully enable nested
support for MSHV.

Signed-off-by: Muminul Islam <muislam@microsoft.com>

hypervisor/src/lib.rs

@@ -170,6 +170,7 @@ pub struct HypervisorVmConfig {
     pub sev_snp_enabled: bool,
     #[cfg(feature = "sev_snp")]
     pub mem_size: u64,
+    pub nested: bool,
 }
 
 #[derive(Copy, Clone)]