tools/virtio: add device, device_driver stubs

Add stubs needed by virtio.h

Message-ID: <0fabf13f6ea812ebc73b1c919fb17d4dec1545db.1764873799.git.mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Author: mstsirkin

tools/virtio/linux/device.h

@@ -1,2 +1,10 @@
 #ifndef LINUX_DEVICE_H
+
+struct device {
+	void *parent;
+};
+
+struct device_driver {
+	const char *name;
+};
 #endif