[SCSI] libfc: make fc_rport_priv the primary rport interface.

The rport and discovery modules deal with remote ports
before fc_remote_port_add() can be done, because the
full set of rport identifiers is not known at early stages.

In preparation for splitting the fc_rport/fc_rport_priv allocation,
make fc_rport_priv the primary interface for the remote port and
discovery engines.

The FCP / SCSI layers still deal with fc_rport and
fc_rport_libfc_priv, however.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/include/scsi/fc_encode.h b/include/scsi/fc_encode.h
index a0ff61c..3ede1ab 100644
--- a/include/scsi/fc_encode.h
+++ b/include/scsi/fc_encode.h
@@ -249,10 +249,13 @@
 /**
  * fc_els_fill - Fill in an ELS  request frame
  */
-static inline int fc_els_fill(struct fc_lport *lport, struct fc_rport *rport,
+static inline int fc_els_fill(struct fc_lport *lport,
+		       struct fc_rport_priv *rdata,
 		       struct fc_frame *fp, unsigned int op,
 		       enum fc_rctl *r_ctl, u32 *did, enum fc_fh_type *fh_type)
 {
+	struct fc_rport *rport = PRIV_TO_RPORT(rdata);
+
 	switch (op) {
 	case ELS_PLOGI:
 		fc_plogi_fill(lport, fp, ELS_PLOGI);
@@ -272,7 +275,7 @@
 		 * is port logo, therefore
 		 * set did to rport id.
 		 */
-		if (rport)
+		if (rdata)
 			*did = rport->port_id;
 		break;