cnss2: Refine the pci power setting log

In current implementation, the error log not record the
return value of setting pci power function, with this return
value we can know the reason of why setting pci power failed.

Change-Id: Icf1fdba16faf539334704ca1f8ce24fecd49aa94

cnss2/pci.c

@@ -1424,7 +1424,8 @@ int cnss_suspend_pci_link(struct cnss_pci_data *pci_priv)
 	pci_disable_device(pci_priv->pci_dev);
 
 	if (pci_priv->pci_dev->device != QCA6174_DEVICE_ID) {
-		if (pci_set_power_state(pci_priv->pci_dev, PCI_D3hot))
+		ret = pci_set_power_state(pci_priv->pci_dev, PCI_D3hot);
+		if (ret)
 			cnss_pr_err("Failed to set D3Hot, err =  %d\n", ret);
 	}