regulator: userspace-consumer: quiet device deferral

Trying to use userspace-consumer when the required supplies have not yet
been probed will throw an error message on deferral:
reg-userspace-consumer output-led-power: Failed to get supplies: -517

So, lets simply use dev_err_probe() instead of dev_err() to not print
errors in case when driver probe is being deferred.
Signed-off-by: Robert Marko <robimarko@gmail.com>
Link: https://patch.msgid.link/20240623140947.1252376-1-robimarko@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/userspace-consumer.c

@@ -158,10 +158,8 @@ static int regulator_userspace_consumer_probe(struct platform_device *pdev)
 
 	ret = devm_regulator_bulk_get_exclusive(&pdev->dev, drvdata->num_supplies,
 						drvdata->supplies);
-	if (ret) {
-		dev_err(&pdev->dev, "Failed to get supplies: %d\n", ret);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "Failed to get supplies\n");
 
 	platform_set_drvdata(pdev, drvdata);