ASoC: cs35l56: fix usages of device_get_named_child_node()

The documentation for device_get_named_child_node() mentions this
important point:

"
The caller is responsible for calling fwnode_handle_put() on the
returned fwnode pointer.
"

Add fwnode_handle_put() to avoid leaked references.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20240426152939.38471-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/cs35l56.c

@@ -1360,13 +1360,15 @@ static int cs35l56_try_get_broken_sdca_spkid_gpio(struct cs35l56_private *cs35l5
 				    "spk-id-gpios", ACPI_TYPE_PACKAGE, &obj);
 	if (ret) {
 		dev_dbg(cs35l56->base.dev, "Could not get spk-id-gpios package: %d\n", ret);
+		fwnode_handle_put(af01_fwnode);
 		return -ENOENT;
 	}
 
 	/* The broken properties we can handle are a 4-element package (one GPIO) */
 	if (obj->package.count != 4) {
 		dev_warn(cs35l56->base.dev, "Unexpected spk-id element count %d\n",
 			 obj->package.count);
+		fwnode_handle_put(af01_fwnode);
 		return -ENOENT;
 	}
 
@@ -1381,21 +1383,25 @@ static int cs35l56_try_get_broken_sdca_spkid_gpio(struct cs35l56_private *cs35l5
 		 */
 		ret = acpi_dev_add_driver_gpios(adev, cs35l56_af01_spkid_gpios_mapping);
 		if (ret) {
+			fwnode_handle_put(af01_fwnode);
 			return dev_err_probe(cs35l56->base.dev, ret,
 					     "Failed to add gpio mapping to AF01\n");
 		}
 
 		ret = devm_add_action_or_reset(cs35l56->base.dev,
 					       cs35l56_acpi_dev_release_driver_gpios,
 					       adev);
-		if (ret)
+		if (ret) {
+			fwnode_handle_put(af01_fwnode);
 			return ret;
+		}
 
 		dev_dbg(cs35l56->base.dev, "Added spk-id-gpios mapping to AF01\n");
 	}
 
 	desc = fwnode_gpiod_get_index(af01_fwnode, "spk-id", 0, GPIOD_IN, NULL);
 	if (IS_ERR(desc)) {
+		fwnode_handle_put(af01_fwnode);
 		ret = PTR_ERR(desc);
 		return dev_err_probe(cs35l56->base.dev, ret, "Get GPIO from AF01 failed\n");
 	}
@@ -1404,9 +1410,12 @@ static int cs35l56_try_get_broken_sdca_spkid_gpio(struct cs35l56_private *cs35l5
 	gpiod_put(desc);
 
 	if (ret < 0) {
+		fwnode_handle_put(af01_fwnode);
 		dev_err_probe(cs35l56->base.dev, ret, "Error reading spk-id GPIO\n");
 		return ret;
-		}
+	}
+
+	fwnode_handle_put(af01_fwnode);
 
 	dev_info(cs35l56->base.dev, "Got spk-id from AF01\n");