datapath: use vport instead of p

All functions used struct vport *vport except
ovs_vport_find_upcall_portid.

This fixes 1 kerneldoc warning

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

datapath/vport.c

@@ -417,12 +417,12 @@ int ovs_vport_get_upcall_portids(const struct vport *vport,
  *
  * Returns the portid of the target socket.  Must be called with rcu_read_lock.
  */
-u32 ovs_vport_find_upcall_portid(const struct vport *p, struct sk_buff *skb)
+u32 ovs_vport_find_upcall_portid(const struct vport *vport, struct sk_buff *skb)
 {
 	struct vport_portids *ids;
 	u32 hash;
 
-	ids = rcu_dereference(p->upcall_portids);
+	ids = rcu_dereference(vport->upcall_portids);
 
 	if (ids->n_ids == 1 && ids->ids[0] == 0)
 		return 0;