[SCTP] Don't do any ppid byte-order conversions as it is opaque to SCTP.

net/sctp/sm_make_chunk.c

@@ -516,7 +516,7 @@ struct sctp_chunk *sctp_make_datafrag_empty(struct sctp_association *asoc,
 	 */
 	dp.tsn = 0;
 	dp.stream = htons(sinfo->sinfo_stream);
-	dp.ppid   = htonl(sinfo->sinfo_ppid);
+	dp.ppid   = sinfo->sinfo_ppid;
 
 	/* Set the flags for an unordered send.  */
 	if (sinfo->sinfo_flags & MSG_UNORDERED) {

net/sctp/ulpevent.c

@@ -663,7 +663,7 @@ struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc,
 	 * for and this information is passed opaquely by the SCTP stack from
 	 * one end to the other.
 	 */
-	info->sinfo_ppid = ntohl(chunk->subh.data_hdr->ppid);
+	info->sinfo_ppid = chunk->subh.data_hdr->ppid;
 
 	/* Sockets API Extensions for SCTP
 	 * Section 5.2.2 SCTP Header Information Structure (SCTP_SNDRCV)