Phonet: remove tautologies

These checks don't make sense anymore since rtnl_notify() cannot fail.
Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/phonet/pn_netlink.c

@@ -53,7 +53,6 @@ void phonet_address_notify(int event, struct net_device *dev, u8 addr)
 		    RTNLGRP_PHONET_IFADDR, NULL, GFP_KERNEL);
 	return;
 errout:
-	if (err < 0)
 	rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_IFADDR, err);
 }
 
@@ -212,7 +211,6 @@ void rtm_phonet_notify(int event, struct net_device *dev, u8 dst)
 			  RTNLGRP_PHONET_ROUTE, NULL, GFP_KERNEL);
 	return;
 errout:
-	if (err < 0)
 	rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_ROUTE, err);
 }