selinux: Cleanup printk logging in netnode

Replace printk with pr_* to avoid checkpatch warnings.
Signed-off-by: Peter Enderborg <peter.enderborg@sony.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

security/selinux/netnode.c

@@ -238,9 +238,8 @@ static int sel_netnode_sid_slow(void *addr, u16 family, u32 *sid)
 out:
 	spin_unlock_bh(&sel_netnode_lock);
 	if (unlikely(ret)) {
-		printk(KERN_WARNING
-		       "SELinux: failure in sel_netnode_sid_slow(),"
-		       " unable to determine network node label\n");
+		pr_warn("SELinux: failure in %s(), unable to determine network node label\n",
+			__func__);
 		kfree(new);
 	}
 	return ret;