NTB: namespacecheck cleanups

Declare ntb_bus_type static to remove it from name space, and remove
unused ntb_get_max_spads function.  Found via `make namespacecheck`.
Signed-off-by: NJon Mason <jon.mason@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/ntb/ntb_hw.c

@@ -236,20 +236,6 @@ void ntb_unregister_transport(struct ntb_device *ndev)
 	ndev->ntb_transport = NULL;
 }
 
-/**
- * ntb_get_max_spads() - get the total scratch regs usable
- * @ndev: pointer to ntb_device instance
- *
- * This function returns the max 32bit scratchpad registers usable by the
- * upper layer.
- *
- * RETURNS: total number of scratch pad registers available
- */
-int ntb_get_max_spads(struct ntb_device *ndev)
-{
-	return ndev->limits.max_spads;
-}
-
 /**
  * ntb_write_local_spad() - write to the secondary scratchpad register
  * @ndev: pointer to ntb_device instance

drivers/ntb/ntb_transport.c

@@ -212,7 +212,7 @@ static int ntb_client_remove(struct device *dev)
 	return 0;
 }
 
-struct bus_type ntb_bus_type = {
+static struct bus_type ntb_bus_type = {
 	.name = "ntb_bus",
 	.match = ntb_match_bus,
 	.probe = ntb_client_probe,