usb: cdc-wdm: Use skb_put_data() instead of skb_put/memcpy pair

Use skb_put_data() instead of skb_put() and memcpy(), which is clear.
Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Acked-by: Oliver Neukum <oneukum@suse.com>
Link: https://lore.kernel.org/r/20220927024344.14352-1-shangxiaojing@huawei.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/class/cdc-wdm.c

@@ -958,7 +958,7 @@ static void wdm_wwan_rx(struct wdm_device *desc, int length)
 	if (!skb)
 		return;
 
-	memcpy(skb_put(skb, length), desc->inbuf, length);
+	skb_put_data(skb, desc->inbuf, length);
 	wwan_port_rx(port, skb);
 
 	/* inbuf has been copied, it is safe to check for outstanding data */