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>
diff --git a/net/ipv6/udplite.c b/net/ipv6/udplite.c
index ba162a8..4818c48 100644
--- a/net/ipv6/udplite.c
+++ b/net/ipv6/udplite.c
@@ -20,7 +20,7 @@
 
 static void udplitev6_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)
 {
 	__udp6_lib_err(skb, opt, type, code, offset, info, &udplite_table);
 }