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

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/ucc_geth.c b/drivers/net/ucc_geth.c
index bec413b..9741d61 100644
--- a/drivers/net/ucc_geth.c
+++ b/drivers/net/ucc_geth.c
@@ -3607,7 +3607,7 @@
 
 static irqreturn_t ucc_geth_irq_handler(int irq, void *info)
 {
-	struct net_device *dev = (struct net_device *)info;
+	struct net_device *dev = info;
 	struct ucc_geth_private *ugeth = netdev_priv(dev);
 	struct ucc_fast_private *uccf;
 	struct ucc_geth_info *ug_info;