NTB: Comment Fix

Add "data" ntb_register_db_callback parameter description comment and
correct poor spelling.

Signed-off-by: Jon Mason <jon.mason@intel.com>
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 90ec17f..12a9e83 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -1583,7 +1583,7 @@
  * @len: length of the data buffer
  *
  * Enqueue a new transmit buffer onto the transport queue from which a NTB
- * payload will be transmitted.  This assumes that a lock is behing held to
+ * payload will be transmitted.  This assumes that a lock is being held to
  * serialize access to the qp.
  *
  * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
@@ -1641,7 +1641,7 @@
  *
  * Notify NTB transport layer of client's desire to no longer receive data on
  * transport queue specified.  It is the client's responsibility to ensure all
- * entries on queue are purged or otherwise handled appropraitely.
+ * entries on queue are purged or otherwise handled appropriately.
  */
 void ntb_transport_link_down(struct ntb_transport_qp *qp)
 {