[ARM] Remove pointless casts from void pointers,

mostly in and around irq handlers.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/sound/oss/waveartist.c b/sound/oss/waveartist.c
index b48c729..8849041 100644
--- a/sound/oss/waveartist.c
+++ b/sound/oss/waveartist.c
@@ -835,7 +835,7 @@
 static irqreturn_t
 waveartist_intr(int irq, void *dev_id)
 {
-	wavnc_info *devc = (wavnc_info *)dev_id;
+	wavnc_info *devc = dev_id;
 	int	   irqstatus, status;
 
 	spin_lock(&waveartist_lock);