OPAL_PRD_MSG
============

The OPAL_PRD_MSG call is used to pass a struct opal_prd_msg from the HBRT
code into opal, and is paired with the OPAL_PRD_MSG message type.

Parameters
----------

``struct opal_msg *msg``
  Passes an opal_msg, of type OPAL_PRD_MSG, from the OS to OPAL.
