Phonet: remove tautologies

These checks don't make sense anymore since rtnl_notify() cannot fail.

Signed-off-by: Rémi Denis-Courmont <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/phonet/pn_netlink.c

···
 		    RTNLGRP_PHONET_IFADDR, NULL, GFP_KERNEL);
 	return;
 errout:
-	if (err < 0)
-		rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_IFADDR, err);
+	rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_IFADDR, err);
 }
 
 static const struct nla_policy ifa_phonet_policy[IFA_MAX+1] = {
···
 			  RTNLGRP_PHONET_ROUTE, NULL, GFP_KERNEL);
 	return;
 errout:
-	if (err < 0)
-		rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_ROUTE, err);
+	rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_ROUTE, err);
 }
 
 static const struct nla_policy rtm_phonet_policy[RTA_MAX+1] = {