libceph: fully initialize connection in con_init()

Move the initialization of a ceph connection's private pointer,
operations vector pointer, and peer name information into
ceph_con_init().  Rearrange the arguments so the connection pointer
is first.  Hide the byte-swapping of the peer entity number inside
ceph_con_init()

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 5b41a69..448c9da 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -640,11 +640,8 @@
 	INIT_LIST_HEAD(&osd->o_osd_lru);
 	osd->o_incarnation = 1;
 
-	ceph_con_init(&osdc->client->msgr, &osd->o_con);
-	osd->o_con.private = osd;
-	osd->o_con.ops = &osd_con_ops;
-	osd->o_con.peer_name.type = CEPH_ENTITY_TYPE_OSD;
-	osd->o_con.peer_name.num = cpu_to_le64(onum);
+	ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr,
+		CEPH_ENTITY_TYPE_OSD, onum);
 
 	INIT_LIST_HEAD(&osd->o_keepalive_item);
 	return osd;