cb710: use SG_MITER_TO_SG/SG_MITER_FROM_SG

the code allready uses flush_kernel_dcache_page(). This patch updates the
driver to the recent sg API changes which require that either SG_MITER_TO_SG
or SG_MITER_FROM_SG is set. SG_MITER_TO_SG calls flush_kernel_dcache_page()
in sg_mitter_stop()

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Acked-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
diff --git a/drivers/mmc/host/cb710-mmc.c b/drivers/mmc/host/cb710-mmc.c
index 11efefb..4e72964 100644
--- a/drivers/mmc/host/cb710-mmc.c
+++ b/drivers/mmc/host/cb710-mmc.c
@@ -278,7 +278,7 @@
 	if (unlikely(data->blksz & 15 && (data->blocks != 1 || data->blksz != 8)))
 		return -EINVAL;
 
-	sg_miter_start(&miter, data->sg, data->sg_len, 0);
+	sg_miter_start(&miter, data->sg, data->sg_len, SG_MITER_TO_SG);
 
 	cb710_modify_port_8(slot, CB710_MMC_CONFIG2_PORT,
 		15, CB710_MMC_C2_READ_PIO_SIZE_MASK);
@@ -307,7 +307,7 @@
 			goto out;
 	}
 out:
-	cb710_sg_miter_stop_writing(&miter);
+	sg_miter_stop(&miter);
 	return err;
 }
 
@@ -322,7 +322,7 @@
 	if (unlikely(data->blocks > 1 && data->blksz & 15))
 		return -EINVAL;
 
-	sg_miter_start(&miter, data->sg, data->sg_len, 0);
+	sg_miter_start(&miter, data->sg, data->sg_len, SG_MITER_FROM_SG);
 
 	cb710_modify_port_8(slot, CB710_MMC_CONFIG2_PORT,
 		0, CB710_MMC_C2_READ_PIO_SIZE_MASK);