dm: dfu: mmc: Support CONFIG_BLK in DFU for MMC

Update the method of accessing the block device so that it works with
CONFIG_BLK enabled.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/dfu/dfu_mmc.c

@@ -49,7 +49,7 @@ static int mmc_block_op(enum dfu_op op, struct dfu_entity *dfu,
 	}
 
 	if (dfu->data.mmc.hw_partition >= 0) {
-		part_num_bkp = mmc->block_dev.hwpart;
+		part_num_bkp = mmc_get_blk_desc(mmc)->hwpart;
 		ret = blk_select_hwpart_devnum(IF_TYPE_MMC,
 					       dfu->data.mmc.dev_num,
 					       dfu->data.mmc.hw_partition);
@@ -62,12 +62,11 @@ static int mmc_block_op(enum dfu_op op, struct dfu_entity *dfu,
 	      dfu->data.mmc.dev_num, blk_start, blk_count, buf);
 	switch (op) {
 	case DFU_OP_READ:
-		n = mmc->block_dev.block_read(&mmc->block_dev, blk_start,
-					      blk_count, buf);
+		n = blk_dread(mmc_get_blk_desc(mmc), blk_start, blk_count, buf);
 		break;
 	case DFU_OP_WRITE:
-		n = mmc->block_dev.block_write(&mmc->block_dev, blk_start,
-					       blk_count, buf);
+		n = blk_dwrite(mmc_get_blk_desc(mmc), blk_start, blk_count,
+			       buf);
 		break;
 	default:
 		error("Operation not supported\n");
@@ -356,7 +355,7 @@ int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char *s)
 
 	} else if (!strcmp(entity_type, "part")) {
 		disk_partition_t partinfo;
-		struct blk_desc *blk_dev = &mmc->block_dev;
+		struct blk_desc *blk_dev = mmc_get_blk_desc(mmc);
 		int mmcdev = second_arg;
 		int mmcpart = third_arg;