drivers/net/wireless/iwmc3200wifi: Use kmemdup

Use kmemdup when some other buffer is immediately copied into the
allocated region.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to,size,flag;
statement S;
@@

-  to = \(kmalloc\|kzalloc\)(size,flag);
+  to = kmemdup(from,size,flag);
   if (to==NULL || ...) S
-  memcpy(to, from, size);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwmc3200wifi/rx.c

@@ -321,14 +321,14 @@ iwm_rx_ticket_node_alloc(struct iwm_priv *iwm, struct iwm_rx_ticket *ticket)
 		return ERR_PTR(-ENOMEM);
 	}
 
-	ticket_node->ticket = kzalloc(sizeof(struct iwm_rx_ticket), GFP_KERNEL);
+	ticket_node->ticket = kmemdup(ticket, sizeof(struct iwm_rx_ticket),
+				      GFP_KERNEL);
 	if (!ticket_node->ticket) {
 		IWM_ERR(iwm, "Couldn't allocate RX ticket\n");
 		kfree(ticket_node);
 		return ERR_PTR(-ENOMEM);
 	}
 
-	memcpy(ticket_node->ticket, ticket, sizeof(struct iwm_rx_ticket));
 	INIT_LIST_HEAD(&ticket_node->node);
 
 	return ticket_node;