xfrm: Mark flowi arg to xfrm_bundle_create() const.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 3d45456..a558dc7 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1390,7 +1390,7 @@
 
 static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy,
 					    struct xfrm_state **xfrm, int nx,
-					    struct flowi *fl,
+					    const struct flowi *fl,
 					    struct dst_entry *dst)
 {
 	struct net *net = xp_net(policy);