enic: Don't indicate IPv6 pkts using soft-LRO

LRO is only applied to IPv4 pkts, so don't use the LRO indication functions
for anything other IPv4 pkts.  Every non-IPv4 pkt is indicated using non-
LRO functions.

Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/net/enic/enic_main.c

@@ -941,7 +941,7 @@ static void enic_rq_indicate_buf(struct vnic_rq *rq,
 
 		if (enic->vlan_group && vlan_stripped) {
 
-			if (ENIC_SETTING(enic, LRO))
+			if (ENIC_SETTING(enic, LRO) && ipv4)
 				lro_vlan_hwaccel_receive_skb(&enic->lro_mgr,
 					skb, enic->vlan_group,
 					vlan, cq_desc);
@@ -951,7 +951,7 @@ static void enic_rq_indicate_buf(struct vnic_rq *rq,
 
 		} else {
 
-			if (ENIC_SETTING(enic, LRO))
+			if (ENIC_SETTING(enic, LRO) && ipv4)
 				lro_receive_skb(&enic->lro_mgr, skb, cq_desc);
 			else
 				netif_receive_skb(skb);