ethernet: Remove casts to same type

Adding casts of objects to the same type is unnecessary
and confusing for a human reader.

For example, this cast:

        int y;
        int *p = (int *)&y;

I used the coccinelle script below to find and remove these
unnecessary casts.  I manually removed the conversions this
script produces of casts with __force, __iomem and __user.

@@
type T;
T *p;
@@

-       (T *)p
+       p

A function in atl1e_main.c was passed a const pointer
when it actually modified elements of the structure.

Change the argument to a non-const pointer.

A function in stmmac needed a __force to avoid a sparse
warning.  Added it.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2.c

@@ -872,8 +872,7 @@ bnx2_alloc_mem(struct bnx2 *bp)
 
 			bnapi = &bp->bnx2_napi[i];
 
-			sblk = (void *) (status_blk +
-					 BNX2_SBLK_MSIX_ALIGN_SIZE * i);
+			sblk = (status_blk + BNX2_SBLK_MSIX_ALIGN_SIZE * i);
 			bnapi->status_blk.msix = sblk;
 			bnapi->hw_tx_cons_ptr =
 				&sblk->status_tx_quick_consumer_index;