Eliminate pointless casts from void* in a few driver irq handlers.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/wan/sbni.c b/drivers/net/wan/sbni.c
index 76db40d..2e8b5c2 100644
--- a/drivers/net/wan/sbni.c
+++ b/drivers/net/wan/sbni.c
@@ -502,8 +502,8 @@
 static irqreturn_t
 sbni_interrupt( int  irq,  void  *dev_id )
 {
-	struct net_device	  *dev = (struct net_device *) dev_id;
-	struct net_local  *nl  = (struct net_local *) dev->priv;
+	struct net_device	  *dev = dev_id;
+	struct net_local  *nl  = dev->priv;
 	int	repeat;
 
 	spin_lock( &nl->lock );