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

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/atm/horizon.c b/drivers/atm/horizon.c
index f96446c..9b2cf25 100644
--- a/drivers/atm/horizon.c
+++ b/drivers/atm/horizon.c
@@ -1382,8 +1382,9 @@
 
 /********** interrupt handler **********/
 
-static irqreturn_t interrupt_handler(int irq, void *dev_id) {
-  hrz_dev * dev = (hrz_dev *) dev_id;
+static irqreturn_t interrupt_handler(int irq, void *dev_id)
+{
+  hrz_dev *dev = dev_id;
   u32 int_source;
   unsigned int irq_ok;