net: fix two coding style issues

This is a simple cleanup addressing two coding style issues found by
checkpatch.pl in an earlier patch. It's submitted as a separate patch to
keep the original patch as it was generated by spatch.

Signed-off-by: Michal Kubecek <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/bridge/br_netlink.c

···
 		goto nla_put_failure;
 
 	if (event == RTM_NEWLINK && port) {
-		struct nlattr *nest
-			= nla_nest_start(skb, IFLA_PROTINFO);
+		struct nlattr *nest;
 
+		nest = nla_nest_start(skb, IFLA_PROTINFO);
 		if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
 			goto nla_put_failure;
 		nla_nest_end(skb, nest);

net/decnet/dn_table.c

···
 		struct rtnexthop *nhp;
 		struct nlattr *mp_head;
 
-		if (!(mp_head = nla_nest_start_noflag(skb, RTA_MULTIPATH)))
+		mp_head = nla_nest_start_noflag(skb, RTA_MULTIPATH);
+		if (!mp_head)
 			goto errout;
 
 		for_nexthops(fi) {