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/macmace.c b/drivers/net/macmace.c
index c685a46..4286e67 100644
--- a/drivers/net/macmace.c
+++ b/drivers/net/macmace.c
@@ -221,7 +221,7 @@
 	SET_NETDEV_DEV(dev, &pdev->dev);
 
 	dev->base_addr = (u32)MACE_BASE;
-	mp->mace = (volatile struct mace *) MACE_BASE;
+	mp->mace = MACE_BASE;
 
 	dev->irq = IRQ_MAC_MACE;
 	mp->dma_intr = IRQ_MAC_MACE_DMA;