sctp: remove the typedef sctp_addip_chunk_t

This patch is to remove the typedef sctp_addip_chunk_t, and
replace with struct sctp_addip_chunk in the places where it's
using this typedef.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/sctp.h b/include/linux/sctp.h
index 83dac9b..e7b439e 100644
--- a/include/linux/sctp.h
+++ b/include/linux/sctp.h
@@ -639,10 +639,10 @@ struct sctp_addiphdr {
 	__u8	params[0];
 };
 
-typedef struct sctp_addip_chunk {
+struct sctp_addip_chunk {
 	struct sctp_chunkhdr chunk_hdr;
 	struct sctp_addiphdr addip_hdr;
-} sctp_addip_chunk_t;
+};
 
 /* AUTH
  * Section 4.1  Authentication Chunk (AUTH)