Fix kernel-doc warning in <linux/skbuff.h> by making both headers_start
and headers_end private fields.
Warning(..//include/linux/skbuff.h:654): No description found for parameter 'headers_end[0]'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
        /* fields enclosed in headers_start/headers_end are copied
         * using a single memcpy() in __copy_skb_header()
         */
+       /* private: */
        __u32                   headers_start[0];
+       /* public: */
 
 /* if you move pkt_type around you also must adapt those constants */
 #ifdef __BIG_ENDIAN_BITFIELD
        __u16                   network_header;
        __u16                   mac_header;
 
+       /* private: */
        __u32                   headers_end[0];
+       /* public: */
 
        /* These elements must be at the end, see alloc_skb() for details.  */
        sk_buff_data_t          tail;