Canon has dropped it from their SDK as Neuro mentioned. FoCal has tried to find undocumented commands to no avail.
They recommend complaining to Canon and asking that it be added to the SDK. Otherwise, it may not appear in any of the new pro level cameras.
FoCal Pro does have a mode that only requires two settings, and is then able to predict the AFMA. Its called Turbocal. A third test is merely a verification that it was the right setting. They have done so many tests using the 5D MK III that they have a curve fitting routine based on only two points, its not perfectly accurate, but its still more than good enough.
Download the user manuals from this page to read about this feature. http://www.reikan.co.uk/focalweb/index.php/why/documents-to-download/