wireless: Remove unnecessary alloc/OOM messages, alloc cleanups

alloc failures already get standardized OOM
messages and a dump_stack.

Convert kzalloc's with multiplies to kcalloc.
Convert kmalloc's with multiplies to kmalloc_array.
Remove now unused variables.
Remove unnecessary memset after kzalloc->kcalloc.
Whitespace cleanups for these changes.

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

drivers/net/wireless/zd1211rw/zd_usb.c

@@ -155,7 +155,6 @@ static int upload_code(struct usb_device *udev,
 	 */
 	p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
 	if (!p) {
-		dev_err(&udev->dev, "out of memory\n");
 		r = -ENOMEM;
 		goto error;
 	}