soc: qcom: ubwc: Simplify with of_machine_get_match_data()

Replace open-coded getting root OF node, matching against it and getting
the match data with new of_machine_get_match_data() helper.

Reviewed-by: Dmitry Baryshkov <[e-mail]>
Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: AngeloGioacchino Del Regno <[e-mail]>
Tested-by: AngeloGioacchino Del Regno <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Rob Herring (Arm) <[e-mail]>

drivers/soc/qcom/ubwc_config.c

···
 
 const struct qcom_ubwc_cfg_data *qcom_ubwc_config_get_data(void)
 {
-	const struct of_device_id *match;
-	struct device_node *root;
+	const struct qcom_ubwc_cfg_data *data;
 
-	root = of_find_node_by_path("/");
-	if (!root)
-		return ERR_PTR(-ENODEV);
-
-	match = of_match_node(qcom_ubwc_configs, root);
-	of_node_put(root);
-	if (!match) {
+	data = of_machine_get_match_data(qcom_ubwc_configs);
+	if (!data) {
 		pr_err("Couldn't find UBWC config data for this platform!\n");
 		return ERR_PTR(-EINVAL);
 	}
 
-	return match->data;
+	return data;
 }
 EXPORT_SYMBOL_GPL(qcom_ubwc_config_get_data);