via-velocity : fix compilation warning.

Fix this warning:
drivers/net/via-velocity.c:1924: warning: passing argument 2 of 'request_irq' from incompatible pointer type
Signed-off-by: Seguier Regis <rseguier@e-teleport.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/via-velocity.c

@@ -377,7 +377,7 @@ static void velocity_print_info(struct velocity_info *vptr);
 static int velocity_open(struct net_device *dev);
 static int velocity_change_mtu(struct net_device *dev, int mtu);
 static int velocity_xmit(struct sk_buff *skb, struct net_device *dev);
-static int velocity_intr(int irq, void *dev_instance);
+static irqreturn_t velocity_intr(int irq, void *dev_instance);
 static void velocity_set_multi(struct net_device *dev);
 static struct net_device_stats *velocity_get_stats(struct net_device *dev);
 static int velocity_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
@@ -2215,7 +2215,7 @@ out:
  *	efficiently as possible.
  */
 
-static int velocity_intr(int irq, void *dev_instance)
+static irqreturn_t velocity_intr(int irq, void *dev_instance)
 {
 	struct net_device *dev = dev_instance;
 	struct velocity_info *vptr = netdev_priv(dev);