ipv6: Use correct data types for ICMPv6 type and code

Change all the code that deals directly with ICMPv6 type and code
values to use u8 instead of a signed int as that's the actual data
type.

Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sctp/ipv6.c

@@ -133,7 +133,7 @@ static struct notifier_block sctp_inet6addr_notifier = {
 
 /* ICMP error handler. */
 SCTP_STATIC void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
-			     int type, int code, int offset, __be32 info)
+			     u8 type, u8 code, int offset, __be32 info)
 {
 	struct inet6_dev *idev;
 	struct sock *sk;