[NETFILTER] Fix sparse endian warnings in pptp helper

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc include/linux/netfilter_ipv4/ip_conntrack_pptp.h
Simple merge

diff --cc include/linux/netfilter_ipv4/ip_conntrack_tuple.h
Simple merge

diff --cc net/ipv4/netfilter/ip_conntrack_helper_pptp.c
Simple merge