tcp: delete redundant calls of tcp_mtup_init()

As tcp_rcv_state_process() has already calls tcp_mtup_init() for non-fastopen
sock, we can delete the redundant calls of tcp_mtup_init() in
tcp_{v4,v6}_syn_recv_sock().

Signed-off-by: Weiping Pan <panweiping3@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc net/ipv4/tcp_ipv4.c
Simple merge

diff --cc net/ipv6/tcp_ipv6.c
Simple merge