can: rcar_canfd: Add missing of_node_put() in rcar_canfd_probe()

We should use of_node_put() for the reference returned by
of_get_child_by_name() which has increased the refcount.

Fixes: 45721c40 ("can: rcar_canfd: Add support for r8a779a0 SoC")
Link: https://lore.kernel.org/all/20220712095623.364287-1-windhl@126.comSigned-off-by: NLiang He <windhl@126.com>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/rcar/rcar_canfd.c

@@ -1843,6 +1843,7 @@ static int rcar_canfd_probe(struct platform_device *pdev)
 		of_child = of_get_child_by_name(pdev->dev.of_node, name);
 		if (of_child && of_device_is_available(of_child))
 			channels_mask |= BIT(i);
+		of_node_put(of_child);
 	}
 
 	if (chip_id != RENESAS_RZG2L) {