xfrm: drop not needed flags variable in XFRM offload struct

After drivers were converted to rely on direction, the flags is not
used anymore and can be removed.
Reviewed-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

include/net/xfrm.h

@@ -136,7 +136,6 @@ struct xfrm_dev_offload {
 	netdevice_tracker	dev_tracker;
 	struct net_device	*real_dev;
 	unsigned long		offload_handle;
-	u8			flags;
 	u8			dir : 2;
 };
 

net/xfrm/xfrm_device.c

@@ -264,8 +264,6 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
 	xso->dev = dev;
 	netdev_tracker_alloc(dev, &xso->dev_tracker, GFP_ATOMIC);
 	xso->real_dev = dev;
-	/* Don't forward bit that is not implemented */
-	xso->flags = xuo->flags & ~XFRM_OFFLOAD_IPV6;
 
 	if (xuo->flags & XFRM_OFFLOAD_INBOUND)
 		xso->dir = XFRM_DEV_OFFLOAD_IN;
@@ -274,7 +272,6 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
 
 	err = dev->xfrmdev_ops->xdo_dev_state_add(x);
 	if (err) {
-		xso->flags = 0;
 		xso->dev = NULL;
 		xso->dir = 0;
 		xso->real_dev = NULL;