gpu: do not double put device node in zx_drm_probe

for_each_available_child_of_node will get and put the node properly,
the following of_node_put will lead to the double put. So just
remove it.
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1534472646-10368-1-git-send-email-zhongjiang@huawei.com

drivers/gpu/drm/zte/zx_drm_drv.c

@@ -161,10 +161,8 @@ static int zx_drm_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	for_each_available_child_of_node(parent, child) {
+	for_each_available_child_of_node(parent, child)
 		component_match_add(dev, &match, compare_of, child);
-		of_node_put(child);
-	}
 
 	return component_master_add_with_match(dev, &zx_drm_master_ops, match);
 }