[SCSI] libiscsi, iscsi_tcp, ib_iser : add sw iscsi host get/set params helpers

iscsid and udev need to key off the hw address being
used so add some helpers for iser and iscsi tcp.

Also convert them

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Cc: Roland Dreier <rdreier@cisco.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index ea0816d..e202cc0 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -224,7 +224,8 @@
 	int			erl;
 	int			tpgt;
 	char			*targetname;
-
+	/* hw address being used for iscsi connection */
+	char			*hwaddress;
 	/* control data */
 	struct iscsi_transport	*tt;
 	struct Scsi_Host	*host;
@@ -255,6 +256,16 @@
 extern int iscsi_queuecommand(struct scsi_cmnd *sc,
 			      void (*done)(struct scsi_cmnd *));
 
+
+/*
+ * iSCSI host helpers.
+ */
+extern int iscsi_host_set_param(struct Scsi_Host *shost,
+				enum iscsi_host_param param, char *buf,
+				int buflen);
+extern int iscsi_host_get_param(struct Scsi_Host *shost,
+				enum iscsi_host_param param, char *buf);
+
 /*
  * session management
  */