tcp: remove the hardcode in the definition of TCPF Macro

TCPF_ macro depends on the definition of TCP_ macro.
So it is better to define them with TCP_ marco.

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>