clk: mediatek: clk-pllfh: fix missing of_node_put() in fhctl_parse_dt()

The device_node pointer returned by of_find_compatible_node() with
refcount incremented, when finish using it, the refcount need be
decreased.

Fixes: d7964de8 ("clk: mediatek: Add new clock driver to handle FHCTL hardware")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221229092946.4162345-1-yangyingliang@huawei.com
[sboyd@kernel.org: Also unmap on error]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/mediatek/clk-pllfh.c

@@ -75,13 +75,13 @@ void fhctl_parse_dt(const u8 *compatible_node, struct mtk_pllfh_data *pllfhs,
 	base = of_iomap(node, 0);
 	if (!base) {
 		pr_err("%s(): ioremap failed\n", __func__);
-		return;
+		goto out_node_put;
 	}
 
 	num_clocks = of_clk_get_parent_count(node);
 	if (!num_clocks) {
 		pr_err("%s(): failed to get clocks property\n", __func__);
-		return;
+		goto err;
 	}
 
 	for (i = 0; i < num_clocks; i++) {
@@ -102,6 +102,13 @@ void fhctl_parse_dt(const u8 *compatible_node, struct mtk_pllfh_data *pllfhs,
 		pllfh->state.ssc_rate = ssc_rate;
 		pllfh->state.base = base;
 	}
+
+out_node_put:
+	of_node_put(node);
+	return;
+err:
+	iounmap(base);
+	goto out_node_put;
 }
 
 static void pllfh_init(struct mtk_fh *fh, struct mtk_pllfh_data *pllfh_data)