staging: netlogic: replace skb_put/pull pair with skb_reserve

The sequence

    skb_put(skb);
    skb_pull(skb);

leads to the same result as

    skb_reserve(skb);

but second is a little shorter and clearer.
Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/netlogic/xlr_net.c

@@ -87,8 +87,7 @@ static inline unsigned char *xlr_alloc_skb(void)
 	if (!skb)
 		return NULL;
 	skb_data = skb->data;
-	skb_put(skb, MAC_SKB_BACK_PTR_SIZE);
-	skb_pull(skb, MAC_SKB_BACK_PTR_SIZE);
+	skb_reserve(skb, MAC_SKB_BACK_PTR_SIZE);
 	memcpy(skb_data, &skb, buf_len);
 
 	return skb->data;