clk: clk-apple-nco: Add NULL check in applnco_probe

Add NULL check in applnco_probe, to handle kernel NULL pointer
dereference error.

Fixes: 6641057d5dba ("clk: clk-apple-nco: Add driver for Apple NCO")
Signed-off-by: Charles Han <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: Martin Povišer <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/clk-apple-nco.c

···
 		memset(&init, 0, sizeof(init));
 		init.name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
 						"%s-%d", np->name, i);
+		if (!init.name)
+			return -ENOMEM;
+
 		init.ops = &applnco_ops;
 		init.parent_data = &pdata;
 		init.num_parents = 1;