clk: at91: pmc: decrement node's refcount

of_find_matching_node() increment node's refcount. Call
of_node_put() to decrement it after it was used.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lkml.kernel.org/r/1588508289-10140-2-git-send-email-claudiu.beznea@microchip.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/at91/pmc.c

@@ -278,6 +278,7 @@ static int __init pmc_register_ops(void)
 		return -ENODEV;
 
 	pmcreg = device_node_to_regmap(np);
+	of_node_put(np);
 	if (IS_ERR(pmcreg))
 		return PTR_ERR(pmcreg);