Reorders struct tcp_options_received to avoid padding and shrinks the
following fields to more appropriate sizes saving 8 bytes.

saw_tstamp: char -> 1 bit
tstamp_ok: char -> 1 bit
sack_ok: char -> 4 bits
wscale_ok: char -> 1 bit
snd_wscale: u8 -> 4 bits
rcv_wscale: u8 -> 4 bits
dsack: u8 -> 1 bit
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>