[PATCH 1/2] tools: virtio: port over virtqueue_map_single_attrs define.

[Yufeng Wang]

Fix compile error when make tools/virtio,
port over the definition of virtqueue_map_single_attrs to tools.
the issue begin at
commit 447beec8065b ("virtio_ring: switch to use dma_{map|unmap}_page()")
then the function name have been changed at
commit b41cb3bcf67f ("virtio: rename dma helpers")

Fixes: b41cb3bcf67fc ("virtio: rename dma helpers")
Signed-off-by: Yufeng Wang <r4o5m6...@163.com>
Tested-by: Haimei Qu <545714...@qq.com>
---
 tools/virtio/linux/virtio.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/virtio/linux/virtio.h b/tools/virtio/linux/virtio.h
index 961e326e3c53..b20e4b633859 100644
--- a/tools/virtio/linux/virtio.h
+++ b/tools/virtio/linux/virtio.h
@@ -97,4 +97,9 @@ void virtqueue_unmap_page_attrs(const struct virtqueue *_vq,
                                dma_addr_t dma_handle,
                                size_t size, enum dma_data_direction dir,
                                unsigned long attrs);
+
+dma_addr_t virtqueue_map_single_attrs(const struct virtqueue *_vq, void *ptr, 
size_t size,
+                                     enum dma_data_direction dir, unsigned 
long attrs);
+
+
 #endif
-- 
2.43.0