vdpa/mlx5: Fix syntax errors in comments

Delete the redundant word 'is'.
Signed-off-by: Xiang wangx <wangxiang@cdjrlc.com>
Message-Id: <20220604143858.16073-1-wangxiang@cdjrlc.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>

drivers/vdpa/mlx5/net/mlx5_vnet.c

@@ -107,7 +107,7 @@ struct mlx5_vdpa_virtqueue {
 
 	/* Resources for implementing the notification channel from the device
 	 * to the driver. fwqp is the firmware end of an RC connection; the
-	 * other end is vqqp used by the driver. cq is is where completions are
+	 * other end is vqqp used by the driver. cq is where completions are
 	 * reported.
 	 */
 	struct mlx5_vdpa_cq cq;