staging: tidspbridge: fix mgr_enum_node_info

The current code was always returning a non-zero status value
to userspace applications when this ioctl was called.

The error code was ENODATA, which isn't actually an error,
it's always returned by dcd_enumerate_object() when it hits the
end of list.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Omar Ramirez Luna <omar.ramirez@ti.com>

drivers/staging/tidspbridge/rmgr/mgr.c

@@ -169,6 +169,11 @@ int mgr_enum_node_info(u32 node_id, struct dsp_ndbprops *pndb_props,
 
 		}
 	}
+
+	/* the last status is not 0, but neither an error */
+	if (status > 0)
+		status = 0;
+
 	if (!status) {
 		if (node_id > (node_index - 1)) {
 			status = -EINVAL;