clk: at91: pmc: do not continue if compatible not located

pmc_register_ops() is called for all AT91 devices. Return
-ENODEV in case of_find_matching_node() returns NULL.

Signed-off-by: Claudiu Beznea <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Stephen Boyd <[email protected]>

Author: claudiubeznea

drivers/clk/at91/pmc.c

@@ -274,6 +274,8 @@ static int __init pmc_register_ops(void)
 	struct device_node *np;
 
 	np = of_find_matching_node(NULL, sama5d2_pmc_dt_ids);
+	if (!np)
+		return -ENODEV;
 
 	pmcreg = device_node_to_regmap(np);
 	if (IS_ERR(pmcreg))