sctp: remove the typedef sctp_chunkhdr_t

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

It is also to fix some indents and use sizeof(variable) instead
of sizeof(type)., especially in sctp_new.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c
index 17854fb..5f86c50 100644
--- a/net/sctp/ulpevent.c
+++ b/net/sctp/ulpevent.c
@@ -158,7 +158,7 @@
 		/* Trim the buffer to the right length.  */
 		skb_trim(skb, sizeof(struct sctp_assoc_change) +
 			 ntohs(chunk->chunk_hdr->length) -
-			 sizeof(sctp_chunkhdr_t));
+			 sizeof(struct sctp_chunkhdr));
 	} else {
 		event = sctp_ulpevent_new(sizeof(struct sctp_assoc_change),
 				  MSG_NOTIFICATION, gfp);