virtio: rename features -> guest_features

Rename features->guest_features. This is
what they are, avoid confusion with
host features which we also need to keep around.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/virtio.c b/hw/virtio.c
index cecd0dc..c25a5f1 100644
--- a/hw/virtio.c
+++ b/hw/virtio.c
@@ -445,7 +445,7 @@
     if (vdev->reset)
         vdev->reset(vdev);
 
-    vdev->features = 0;
+    vdev->guest_features = 0;
     vdev->queue_sel = 0;
     vdev->status = 0;
     vdev->isr = 0;
@@ -598,7 +598,7 @@
 {
     /* Always notify when queue is empty (when feature acknowledge) */
     if ((vring_avail_flags(vq) & VRING_AVAIL_F_NO_INTERRUPT) &&
-        (!(vdev->features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY)) ||
+        (!(vdev->guest_features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY)) ||
          (vq->inuse || vring_avail_idx(vq) != vq->last_avail_idx)))
         return;
 
@@ -625,7 +625,7 @@
     qemu_put_8s(f, &vdev->status);
     qemu_put_8s(f, &vdev->isr);
     qemu_put_be16s(f, &vdev->queue_sel);
-    qemu_put_be32s(f, &vdev->features);
+    qemu_put_be32s(f, &vdev->guest_features);
     qemu_put_be32(f, vdev->config_len);
     qemu_put_buffer(f, vdev->config, vdev->config_len);
 
@@ -670,7 +670,7 @@
                 features, supported_features);
         return -1;
     }
-    vdev->features = features;
+    vdev->guest_features = features;
     vdev->config_len = qemu_get_be32(f);
     qemu_get_buffer(f, vdev->config, vdev->config_len);