drm/virtio: delete notify after virtio_gpu_cmd_context_create

The first 3D ioctl will take care of notification.

Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200401223039.2860-2-gurchetansingh@chromium.org


Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>