drivers/s390/net: Drop memory allocation cast

Drop cast on the result of kmalloc and similar functions.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
type T;
@@

- (T *)
  (\(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
   kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...))
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index fd1f48c..e862c2d 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -606,7 +606,7 @@
 
 	QETH_DBF_TEXT(SETUP, 2, "setupch");
 	for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
-		channel->iob[cnt].data = (char *)
+		channel->iob[cnt].data =
 			kmalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
 		if (channel->iob[cnt].data == NULL)
 			break;