venus: pm_helpers: Fix error check in vcodec_domains_get()

In the function vcodec_domains_get(), dev_pm_domain_attach_by_name()
may return NULL in some cases, so IS_ERR() doesn't meet the
requirements. Thus fix it.

Fixes: 7482a983 ("media: venus: redesign clocks and pm domains control")
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>

drivers/media/platform/qcom/venus/pm_helpers.c

@@ -869,8 +869,8 @@ static int vcodec_domains_get(struct venus_core *core)
 	for (i = 0; i < res->vcodec_pmdomains_num; i++) {
 		pd = dev_pm_domain_attach_by_name(dev,
 						  res->vcodec_pmdomains[i]);
-		if (IS_ERR(pd))
-			return PTR_ERR(pd);
+		if (IS_ERR_OR_NULL(pd))
+			return PTR_ERR(pd) ? : -ENODATA;
 		core->pmdomains[i] = pd;
 	}