staging: android: ion: fix ion_dma_buf_attach signatur

Fixup for "dma_buf: remove device parameter from attach callback v2".

I missed this driver, sorry for the noise. Patch is not even compile
tested.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/230641/

drivers/staging/android/ion/ion.c

@@ -201,7 +201,7 @@ struct ion_dma_buf_attachment {
 	struct list_head list;
 };
 
-static int ion_dma_buf_attach(struct dma_buf *dmabuf, struct device *dev,
+static int ion_dma_buf_attach(struct dma_buf *dmabuf,
 			      struct dma_buf_attachment *attachment)
 {
 	struct ion_dma_buf_attachment *a;
@@ -219,7 +219,7 @@ static int ion_dma_buf_attach(struct dma_buf *dmabuf, struct device *dev,
 	}
 
 	a->table = table;
-	a->dev = dev;
+	a->dev = attachment->dev;
 	INIT_LIST_HEAD(&a->list);
 
 	attachment->priv = a;