firmware: exynos-acpm: silence EPROBE_DEFER error on boot

This driver emits error messages when client drivers are trying to get
an interface handle to this driver here before this driver has
completed _probe().

Given this driver returns -EPROBE_DEFER in that case, this is not an
error and shouldn't be emitted to the log, similar to how
dev_err_probe() behaves, so just remove them.

This change also allows us to simplify the logic around releasing of
the acpm_np handle.

Fixes: a88927b ("firmware: add Exynos ACPM protocol driver")
Signed-off-by: André Draszik <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Krzysztof Kozlowski <[email protected]>

Author: andred

drivers/firmware/samsung/exynos-acpm.c

@@ -680,24 +680,17 @@ static const struct acpm_handle *acpm_get_by_phandle(struct device *dev,
 		return ERR_PTR(-ENODEV);
 
 	pdev = of_find_device_by_node(acpm_np);
-	if (!pdev) {
-		dev_err(dev, "Cannot find device node %s\n", acpm_np->name);
-		of_node_put(acpm_np);
-		return ERR_PTR(-EPROBE_DEFER);
-	}
-
 	of_node_put(acpm_np);
+	if (!pdev)
+		return ERR_PTR(-EPROBE_DEFER);
 
 	acpm = platform_get_drvdata(pdev);
 	if (!acpm) {
-		dev_err(dev, "Cannot get drvdata from %s\n",
-			dev_name(&pdev->dev));
 		platform_device_put(pdev);
 		return ERR_PTR(-EPROBE_DEFER);
 	}
 
 	if (!try_module_get(pdev->dev.driver->owner)) {
-		dev_err(dev, "Cannot get module reference.\n");
 		platform_device_put(pdev);
 		return ERR_PTR(-EPROBE_DEFER);
 	}