ata: remove superfluous casts

Unreferenced casts of void * types are unnecessary so remove them.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/drivers/ata/pata_arasan_cf.c b/drivers/ata/pata_arasan_cf.c
index 73492dd..6fac524 100644
--- a/drivers/ata/pata_arasan_cf.c
+++ b/drivers/ata/pata_arasan_cf.c
@@ -356,7 +356,7 @@
 
 static void dma_callback(void *dev)
 {
-	struct arasan_cf_dev *acdev = (struct arasan_cf_dev *) dev;
+	struct arasan_cf_dev *acdev = dev;
 
 	complete(&acdev->dma_completion);
 }