ipvlan: set hw_enc_features like macvlan

Allow encapsulated packets sent to tunnels layered over ipvlan to use
offloads rather than forcing SW fallbacks.

Since commit f21e507701 ("macvlan: add offload features for
encapsulation"), macvlan has set dev->hw_enc_features to include
everything in dev->features; do likewise in ipvlan.

Signed-off-by: Bill Sommerfeld <wsommerfeld@google.com>
Acked-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ipvlan/ipvlan_main.c

@@ -126,6 +126,7 @@ static int ipvlan_init(struct net_device *dev)
 		     (phy_dev->state & IPVLAN_STATE_MASK);
 	dev->features = phy_dev->features & IPVLAN_FEATURES;
 	dev->features |= NETIF_F_LLTX | NETIF_F_VLAN_CHALLENGED;
+	dev->hw_enc_features |= dev->features;
 	dev->gso_max_size = phy_dev->gso_max_size;
 	dev->gso_max_segs = phy_dev->gso_max_segs;
 	dev->hard_header_len = phy_dev->hard_header_len;