mmc: sdhi/tmio: switch to using dmaengine_slave_config()

This removes the deprecated use of the .private member of struct dma_chan
and switches the sdhi / tmio mmc driver to using the
dmaengine_slave_config() channel configuration method.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index 0990d8a..ce35113 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -86,6 +86,8 @@
 struct tmio_mmc_dma {
 	void *chan_priv_tx;
 	void *chan_priv_rx;
+	int slave_id_tx;
+	int slave_id_rx;
 	int alignment_shift;
 	bool (*filter)(struct dma_chan *chan, void *arg);
 };