tcp: reorganize connection members

Optimize connection size and move timestamp_delta closer to other
timestamp related members.

Type: refactor

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: Iec42efb46482ebfdf234518a4e91af836e4f4c07
diff --git a/src/vnet/tcp/tcp_packet.h b/src/vnet/tcp/tcp_packet.h
index f9c6db4..b0636d8 100644
--- a/src/vnet/tcp/tcp_packet.h
+++ b/src/vnet/tcp/tcp_packet.h
@@ -142,12 +142,12 @@
 
 typedef struct
 {
-  u8 flags;		/** Option flags, see above */
-  u8 wscale;		/**< Window scale advertised */
-  u16 mss;		/**< Maximum segment size advertised */
+  sack_block_t *sacks;	/**< SACK blocks */
   u32 tsval;		/**< Timestamp value */
   u32 tsecr;		/**< Echoed/reflected time stamp */
-  sack_block_t *sacks;	/**< SACK blocks */
+  u16 mss;		/**< Maximum segment size advertised */
+  u8 flags;		/**< Option flags, see above */
+  u8 wscale;		/**< Window scale advertised */
   u8 n_sack_blocks;	/**< Number of SACKs blocks */
 } tcp_options_t;