usb: renesas: Fix refcount leak bug

In usbhs_rza1_hardware_init(), of_find_node_by_name() will return
a node pointer with refcount incremented. We should use of_node_put()
when it is not used anymore.
Signed-off-by: NLiang He <windhl@126.com>
Link: https://lore.kernel.org/r/20220618023205.4056548-1-windhl@126.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/renesas_usbhs/rza.c

@@ -23,6 +23,10 @@ static int usbhs_rza1_hardware_init(struct platform_device *pdev)
 	extal_clk = of_find_node_by_name(NULL, "extal");
 	of_property_read_u32(usb_x1_clk, "clock-frequency", &freq_usb);
 	of_property_read_u32(extal_clk, "clock-frequency", &freq_extal);
+
+	of_node_put(usb_x1_clk);
+	of_node_put(extal_clk);
+
 	if (freq_usb == 0) {
 		if (freq_extal == 12000000) {
 			/* Select 12MHz XTAL */