tcp: cleanup whitespaces

Use tabs consistently in #defines
No functional change intended.

Reported by:	Hannes Elfert
MFC after:	1 week
MFC to:		stable/15

sys/netinet/tcp_var.h

@@ -844,7 +844,7 @@ tcp_packets_this_ack(struct tcpcb *tp, tcp_seq ack)
 #define	TF2_HPTS_CPU_SET	0x00000200 /* t_hpts_cpu is not random */
 #define	TF2_FBYTES_COMPLETE	0x00000400 /* We have first bytes in and out */
 #define	TF2_ECN_USE_ECT1	0x00000800 /* Use ECT(1) marking on session */
-#define TF2_TCP_ACCOUNTING	0x00001000 /* Do TCP accounting */
+#define	TF2_TCP_ACCOUNTING	0x00001000 /* Do TCP accounting */
 #define	TF2_HPTS_CALLS		0x00002000 /* tcp_output() called via HPTS */
 #define	TF2_MBUF_L_ACKS		0x00004000 /* large mbufs for ack compression */
 #define	TF2_MBUF_ACKCMP		0x00008000 /* mbuf ack compression ok */
@@ -1257,7 +1257,7 @@ struct tcp_function_info {
  */
 #define	TCPCTL_DO_RFC1323	1	/* use RFC-1323 extensions */
 #define	TCPCTL_MSSDFLT		3	/* MSS default */
-#define TCPCTL_STATS		4	/* statistics */
+#define	TCPCTL_STATS		4	/* statistics */
 #define	TCPCTL_RTTDFLT		5	/* default RTT estimate */
 #define	TCPCTL_KEEPIDLE		6	/* keepalive idle timer */
 #define	TCPCTL_KEEPINTVL	7	/* interval to send keepalives */
@@ -1357,7 +1357,7 @@ VNET_DECLARE(struct inpcbinfo, tcbinfo);
 #define	V_tcp_do_ecn			VNET(tcp_do_ecn)
 #define	V_tcp_do_rfc1323		VNET(tcp_do_rfc1323)
 #define	V_tcp_tolerate_missing_ts	VNET(tcp_tolerate_missing_ts)
-#define V_tcp_ts_offset_per_conn	VNET(tcp_ts_offset_per_conn)
+#define	V_tcp_ts_offset_per_conn	VNET(tcp_ts_offset_per_conn)
 #define	V_tcp_do_rfc3042		VNET(tcp_do_rfc3042)
 #define	V_tcp_do_rfc3390		VNET(tcp_do_rfc3390)
 #define	V_tcp_do_rfc3465		VNET(tcp_do_rfc3465)