net: sched: cls: fix code style issues

This patch changes some code style issues pointed out by checkpatch
inside the TC cls subsystem.

Signed-off-by: Alexander Aring <aring@mojatatu.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/sch_generic.h

@@ -240,7 +240,8 @@ struct tcf_proto_ops {
 					struct tcf_proto*, unsigned long,
 					u32 handle, struct nlattr **,
 					void **, bool);
-	int			(*delete)(struct tcf_proto*, void *, bool*);
+	int			(*delete)(struct tcf_proto *tp, void *arg,
+					  bool *last);
 	void			(*walk)(struct tcf_proto*, struct tcf_walker *arg);
 	void			(*bind_class)(void *, u32, unsigned long);
 

net/sched/cls_u32.c

@@ -783,7 +783,7 @@ static int u32_set_parms(struct net *net, struct tcf_proto *tp,
 		if (handle) {
 			ht_down = u32_lookup_ht(ht->tp_c, handle);
 
-			if (ht_down == NULL)
+			if (!ht_down)
 				return -EINVAL;
 			ht_down->refcnt++;
 		}
@@ -907,7 +907,7 @@ static int u32_change(struct net *net, struct sk_buff *in_skb,
 	size_t size;
 #endif
 
-	if (opt == NULL)
+	if (!opt)
 		return handle ? -EINVAL : 0;
 
 	err = nla_parse_nested(tb, TCA_U32_MAX, opt, u32_policy, NULL);
@@ -1011,7 +1011,7 @@ static int u32_change(struct net *net, struct sk_buff *in_skb,
 			htid = ht->handle;
 		} else {
 			ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid));
-			if (ht == NULL)
+			if (!ht)
 				return -EINVAL;
 		}
 	} else {