mmc: sh_mmcif: remove unneeded struct sh_mmcif_dma, prepare to shdma conversion

Now that all users have been updated to use the embedded in struct
sh_mmcif_plat_data DMA slave IDs, struct sh_mmcif_dma is no longer needed
and can be removed. This also makes preparation to the shdma base library
conversion easier.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Chris Ball <cjb@laptop.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 724b35e..9e3b9b1 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -385,31 +385,27 @@
 	host->dma_active = false;
 
 	/* We can only either use DMA for both Tx and Rx or not use it at all */
-	if (pdata->dma) {
-		dev_warn(&host->pd->dev,
-			 "Update your platform to use embedded DMA slave IDs\n");
-		tx = &pdata->dma->chan_priv_tx;
-		rx = &pdata->dma->chan_priv_rx;
-	} else {
-		tx = &host->dma_slave_tx;
-		tx->slave_id = pdata->slave_id_tx;
-		rx = &host->dma_slave_rx;
-		rx->slave_id = pdata->slave_id_rx;
-	}
-	if (tx->slave_id > 0 && rx->slave_id > 0) {
+	tx = &host->dma_slave_tx;
+	tx->shdma_slave.slave_id = pdata->slave_id_tx;
+	rx = &host->dma_slave_rx;
+	rx->shdma_slave.slave_id = pdata->slave_id_rx;
+
+	if (tx->shdma_slave.slave_id > 0 && rx->shdma_slave.slave_id > 0) {
 		dma_cap_mask_t mask;
 
 		dma_cap_zero(mask);
 		dma_cap_set(DMA_SLAVE, mask);
 
-		host->chan_tx = dma_request_channel(mask, sh_mmcif_filter, tx);
+		host->chan_tx = dma_request_channel(mask, sh_mmcif_filter,
+						    &tx->shdma_slave);
 		dev_dbg(&host->pd->dev, "%s: TX: got channel %p\n", __func__,
 			host->chan_tx);
 
 		if (!host->chan_tx)
 			return;
 
-		host->chan_rx = dma_request_channel(mask, sh_mmcif_filter, rx);
+		host->chan_rx = dma_request_channel(mask, sh_mmcif_filter,
+						    &rx->shdma_slave);
 		dev_dbg(&host->pd->dev, "%s: RX: got channel %p\n", __func__,
 			host->chan_rx);