INT 2F - MDEBUG display driver - RESTORE GRAPHIC DATA
        AX = D003h
Return: CF set on error
        CF clear if successful
            display restored to the mode it was in before calling AX=D002h and
              the display memory is restored
Note:   MDEBUG calls this function only once every popup session just before
         it exits to normal DOS.
SeeAlso: AX=D002h