media: v4l2-fwnode: Demote warning to debug level

On a imx6q-wandboard the following warnings are observed:

[    4.327794] video-mux 20e0000.iomuxc-gpr:ipu1_csi0_mux: bad remote port parent
[    4.336118] video-mux 20e0000.iomuxc-gpr:ipu2_csi1_mux: bad remote port parent

As explained by Philipp Zabel:

"There are empty endpoint nodes (without remote-endpoint property) labeled ipu1_csi[01]_mux_from_parallel_sensor in the i.MX6 device trees for board DT implementers' convenience. See commit 2539f517acbdc ("ARM:
dts: imx6qdl: Add video multiplexers, mipi_csi, and their connections")."

So demote the warning to debug level and make the wording a bit less misleading.

Suggested-by Philipp Zabel <[email protected]>

Signed-off-by Fabio Estevam <[email protected]>

---
  drivers/media/v4l2-core/v4l2-fwnode.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

drivers/media/v4l2-core/v4l2-fwnode.c +1 -1

index 218f0da..7a3cc10 100644
@@ -613,7 +613,7 @@ v4l2_async_notifier_fwnode_parse_endpoint(struct device *dev,
  	asd->match.fwnode =
  		fwnode_graph_get_remote_port_parent(endpoint);
  	if (!asd->match.fwnode) {
-		dev_warn(dev, "bad remote port parent\n");
+		dev_dbg(dev, "no remote endpoint found\n");
  		ret = -ENOTCONN;
  		goto out_err;
  	}