prov/shm: Store the srx in the fid context

The parent provider should be able to get access to the peer provider
callbacks. Added the srx block in the fid.context so we can retrieve it
later on.

Signed-off-by: Amir Shehata <shehataa@ornl.gov>

prov/shm/src/smr_ep.c

@@ -1420,6 +1420,7 @@ static int smr_ep_ctrl(struct fid *fid, int command, void *arg)
 			if (ret)
 				return ret;
 		} else {
+			ep->util_ep.ep_fid.fid.context = ep->srx;
 			ep->util_ep.ep_fid.msg = &smr_no_recv_msg_ops;
 			ep->util_ep.ep_fid.tagged = &smr_no_recv_tag_ops;
 		}