iio: backend: make use of dev_err_cast_probe()

Using dev_err_cast_probe() to simplify the code.
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20240606-dev-add_dev_errp_probe-v3-3-51bb229edd79@analog.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/industrialio-backend.c

@@ -561,11 +561,9 @@ struct iio_backend *devm_iio_backend_get(struct device *dev, const char *name)
 	}
 
 	fwnode = fwnode_find_reference(dev_fwnode(dev), "io-backends", index);
-	if (IS_ERR(fwnode)) {
-		dev_err_probe(dev, PTR_ERR(fwnode),
-			      "Cannot get Firmware reference\n");
-		return ERR_CAST(fwnode);
-	}
+	if (IS_ERR(fwnode))
+		return dev_err_cast_probe(dev, fwnode,
+					  "Cannot get Firmware reference\n");
 
 	guard(mutex)(&iio_back_lock);
 	list_for_each_entry(back, &iio_back_list, entry) {