sctp: remove the typedef sctp_supported_ext_param_t

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

It is also to use sizeof(variable) instead of sizeof(type).

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 72b8787..7624568 100644
--- a/include/linux/sctp.h
+++ b/include/linux/sctp.h
@@ -309,10 +309,10 @@ struct sctp_adaptation_ind_param {
 };
 
 /* ADDIP Section 4.2.7 Supported Extensions Parameter */
-typedef struct sctp_supported_ext_param {
+struct sctp_supported_ext_param {
 	struct sctp_paramhdr param_hdr;
 	__u8 chunks[0];
-} sctp_supported_ext_param_t;
+};
 
 /* AUTH Section 3.1 Random */
 typedef struct sctp_random_param {