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/davinci_cpdma.c b/drivers/net/davinci_cpdma.c
index ae47f23..dca9d33 100644
--- a/drivers/net/davinci_cpdma.c
+++ b/drivers/net/davinci_cpdma.c
@@ -167,7 +167,7 @@
 	} else {
 		pool->cpumap = dma_alloc_coherent(dev, size, &pool->phys,
 						  GFP_KERNEL);
-		pool->iomap = (void __force __iomem *)pool->cpumap;
+		pool->iomap = pool->cpumap;
 		pool->hw_addr = pool->phys;
 	}