rtnetlink: allow using zero MAC address in rtnl_fdb_{add,del}

This is required for multiple default destinations management in VXLAN
Signed-off-by: NMike Rapoport <mike.rapoport@ravellosystems.com>
Signed-off-by: NStephen Hemminger <stephen@networkplumber.org>

net/core/rtnetlink.c

@@ -2109,10 +2109,6 @@ static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
 	}
 
 	addr = nla_data(tb[NDA_LLADDR]);
-	if (is_zero_ether_addr(addr)) {
-		pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
-		return -EINVAL;
-	}
 
 	err = -EOPNOTSUPP;
 
@@ -2210,10 +2206,6 @@ static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
 	}
 
 	addr = nla_data(tb[NDA_LLADDR]);
-	if (is_zero_ether_addr(addr)) {
-		pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ether address\n");
-		return -EINVAL;
-	}
 
 	err = -EOPNOTSUPP;