cxgb4: Use symbolic constant for VLAN priority calculation

Signed-off-by: NHariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb4/l2t.c

@@ -66,7 +66,7 @@ struct l2t_data {
 
 static inline unsigned int vlan_prio(const struct l2t_entry *e)
 {
-	return e->vlan >> 13;
+	return e->vlan >> VLAN_PRIO_SHIFT;
 }
 
 static inline void l2t_hold(struct l2t_data *d, struct l2t_entry *e)