soc: ti: ti_sci_pm_domains: Check for null return of devm_kcalloc

The allocation funciton devm_kcalloc may fail and return a null pointer,
which would cause a null-pointer dereference later.
It might be better to check it and directly return -ENOMEM just like the
usage of devm_kcalloc in previous code.
Signed-off-by: QintaoShen <unSimple1993@163.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/1648107843-29077-1-git-send-email-unSimple1993@163.com

drivers/soc/ti/ti_sci_pm_domains.c

@@ -183,6 +183,8 @@ static int ti_sci_pm_domain_probe(struct platform_device *pdev)
 		devm_kcalloc(dev, max_id + 1,
 			     sizeof(*pd_provider->data.domains),
 			     GFP_KERNEL);
+	if (!pd_provider->data.domains)
+		return -ENOMEM;
 
 	pd_provider->data.num_domains = max_id + 1;
 	pd_provider->data.xlate = ti_sci_pd_xlate;