KVM: nVMX: Synchronize VMCS12 content with the shadow vmcs

Synchronize between the VMCS12 software controlled structure and the
processor-specific shadow vmcs

Signed-off-by: Abel Gordon <abelg@il.ibm.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>