net: wan: framer: Simplify API framer_provider_simple_of_xlate() implementation

Simplify framer_provider_simple_of_xlate() implementation by API
class_find_device_by_of_node().

Also correct comments to mark its parameter @dev as unused instead of
@Args in passing.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20241213-net_fix-v2-1-6d06130d630f@quicinc.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: zijun-hu

drivers/net/wan/framer/framer-core.c

@@ -732,8 +732,8 @@ EXPORT_SYMBOL_GPL(devm_framer_create);
 
 /**
  * framer_provider_simple_of_xlate() - returns the framer instance from framer provider
- * @dev: the framer provider device
- * @args: of_phandle_args (not used here)
+ * @dev: the framer provider device (not used here)
+ * @args: of_phandle_args
  *
  * Intended to be used by framer provider for the common case where #framer-cells is
  * 0. For other cases where #framer-cells is greater than '0', the framer provider
@@ -743,21 +743,14 @@ EXPORT_SYMBOL_GPL(devm_framer_create);
 struct framer *framer_provider_simple_of_xlate(struct device *dev,
 					       const struct of_phandle_args *args)
 {
-	struct class_dev_iter iter;
-	struct framer *framer;
-
-	class_dev_iter_init(&iter, &framer_class, NULL, NULL);
-	while ((dev = class_dev_iter_next(&iter))) {
-		framer = dev_to_framer(dev);
-		if (args->np != framer->dev.of_node)
-			continue;
+	struct device *target_dev;
 
-		class_dev_iter_exit(&iter);
-		return framer;
-	}
+	target_dev = class_find_device_by_of_node(&framer_class, args->np);
+	if (!target_dev)
+		return ERR_PTR(-ENODEV);
 
-	class_dev_iter_exit(&iter);
-	return ERR_PTR(-ENODEV);
+	put_device(target_dev);
+	return dev_to_framer(target_dev);
 }
 EXPORT_SYMBOL_GPL(framer_provider_simple_of_xlate);