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/include/net/rawv6.h b/include/net/rawv6.h
index 8a22599..f6b9b83 100644
--- a/include/net/rawv6.h
+++ b/include/net/rawv6.h
@@ -6,7 +6,7 @@
 #include <net/protocol.h>
 
 void raw6_icmp_error(struct sk_buff *, int nexthdr,
-		int type, int code, int inner_offset, __be32);
+		u8 type, u8 code, int inner_offset, __be32);
 int raw6_local_deliver(struct sk_buff *, int);
 
 extern int			rawv6_rcv(struct sock *sk,