drivers/net: Remove casts of void *

Unnecessary casts of void * clutter the code.

These are the remainder casts after several specific
patches to remove netdev_priv and dev_priv.

Done via coccinelle script (and a little editing):

$ cat cast_void_pointer.cocci
@@
type T;
T *pt;
void *pv;
@@

- pt = (T *)pv;
+ pt = pv;

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Acked-By: Chris Snook <chris.snook@gmail.com>
Acked-by: Jon Mason <jdmason@kudzu.us>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: David Dillow <dave@thedillows.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index dc0a7aa..3321d71 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -267,7 +267,7 @@
 
 	for (i = 0; i < priv->num_tx_queues; i++) {
 		tx_queue = priv->tx_queue[i];
-		tx_queue->tx_bd_base = (struct txbd8 *) vaddr;
+		tx_queue->tx_bd_base = vaddr;
 		tx_queue->tx_bd_dma_base = addr;
 		tx_queue->dev = ndev;
 		/* enet DMA only understands physical addresses */
@@ -278,7 +278,7 @@
 	/* Start the rx descriptor ring where the tx ring leaves off */
 	for (i = 0; i < priv->num_rx_queues; i++) {
 		rx_queue = priv->rx_queue[i];
-		rx_queue->rx_bd_base = (struct rxbd8 *) vaddr;
+		rx_queue->rx_bd_base = vaddr;
 		rx_queue->rx_bd_dma_base = addr;
 		rx_queue->dev = ndev;
 		addr    += sizeof (struct rxbd8) * rx_queue->rx_ring_size;