netfilter: synproxy: fix sparse errors

Fix verbose sparse errors :

make C=2 CF=-D__CHECK_ENDIAN__ net/ipv4/netfilter/ipt_SYNPROXY.o
Signed-off-by: NEric Dumazet <edumazet@google.com>
Acked-by: NPablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/netfilter/ipt_SYNPROXY.c

@@ -18,7 +18,7 @@
 #include <net/netfilter/nf_conntrack_synproxy.h>
 
 static struct iphdr *
-synproxy_build_ip(struct sk_buff *skb, u32 saddr, u32 daddr)
+synproxy_build_ip(struct sk_buff *skb, __be32 saddr, __be32 daddr)
 {
 	struct iphdr *iph;
 
@@ -220,7 +220,7 @@ synproxy_send_client_ack(const struct synproxy_net *snet,
 	nth->ack_seq	= th->ack_seq;
 	tcp_flag_word(nth) = TCP_FLAG_ACK;
 	nth->doff	= tcp_hdr_size / 4;
-	nth->window	= ntohs(htons(th->window) >> opts->wscale);
+	nth->window	= htons(ntohs(th->window) >> opts->wscale);
 	nth->check	= 0;
 	nth->urg_ptr	= 0;