Make pcie splited from pci and make it configurable.
Signed-off-by: NYang Zhong <yang.zhong@intel.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: NThomas Huth <thuth@redhat.com>
Message-Id: <20190123065618.3520-30-yang.zhong@intel.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>