dm: mmc: Use the new select_hwpart() API

Avoid calling directly into the MMC code - use the new API call instead.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/mmc/mmc_write.c b/drivers/mmc/mmc_write.c
index 7b186f8..f4d42aa 100644
--- a/drivers/mmc/mmc_write.c
+++ b/drivers/mmc/mmc_write.c
@@ -78,7 +78,8 @@
 	if (!mmc)
 		return -1;
 
-	err = mmc_select_hwpart(dev_num, block_dev->hwpart);
+	err = blk_select_hwpart_devnum(IF_TYPE_MMC, dev_num,
+				       block_dev->hwpart);
 	if (err < 0)
 		return -1;
 
@@ -182,7 +183,7 @@
 	if (!mmc)
 		return 0;
 
-	err = mmc_select_hwpart(dev_num, block_dev->hwpart);
+	err = blk_select_hwpart_devnum(IF_TYPE_MMC, dev_num, block_dev->hwpart);
 	if (err < 0)
 		return 0;