dm: error handling dev_get_dma_range()

goto after return has not effect. Calling of_node_put() in case of some
errors and not for others is inconsistent.

Fixes: 51bdb50904b ("dm: Introduce xxx_get_dma_range()")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/core/of_addr.c b/drivers/core/of_addr.c
index 5bc6ca1..b3e384d 100644
--- a/drivers/core/of_addr.c
+++ b/drivers/core/of_addr.c
@@ -372,7 +372,7 @@
 	bus_node->count_cells(dev, &na, &ns);
 	if (!OF_CHECK_COUNTS(na, ns)) {
 		printf("Bad cell count for %s\n", of_node_full_name(dev));
-		return -EINVAL;
+		ret = -EINVAL;
 		goto out_parent;
 	}
 
@@ -380,7 +380,7 @@
 	bus_node->count_cells(parent, &pna, &pns);
 	if (!OF_CHECK_COUNTS(pna, pns)) {
 		printf("Bad cell count for %s\n", of_node_full_name(parent));
-		return -EINVAL;
+		ret = -EINVAL;
 		goto out_parent;
 	}