[NET] skbuff: fix kernel-doc

Fix skbuff.h kernel-doc:
linux-2.6.21-git4//include/linux/skbuff.h:316): No description found for parameter 'transport_header'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/skbuff.h

@@ -197,7 +197,7 @@ typedef unsigned char *sk_buff_data_t;
  *	@tstamp: Time we arrived
  *	@dev: Device we arrived on/are leaving by
  *	@iif: ifindex of device we arrived on
- *	@h: Transport layer header
+ *	@transport_header: Transport layer header
  *	@network_header: Network layer header
  *	@mac_header: Link layer header
  *	@dst: destination entry