This function is the OHCD MDD power-down handler.
BOOL OhcdMdd_PowerDown( LPVOID lpvOhcdObject );
TRUE indicates success. FALSE indicates an error.
This function is called by the PDD as part of processing this function. It causes the MDD to save state and prepare the OHC interface controller to be shut down. The OHC interface controller is placed into reset; SOF generation is disabled.
This function is declared in the Ohcdddsi.h header file.