Follow-up to !600.
-- v2: wineoss: Switch to mmdevapi's unixlib.h. wineoss: Adapt "get_position_params" struct to mmdevapi's. wineoss: Adapt "get_frequency_params" struct to mmdevapi's. wineoss: Adapt "create_stream_params" struct to mmdevapi's. wineoss: Adapt "test_connect_params" struct to mmdevapi's. wineoss: Drop "oss_" prefix in unixlib enum, apply it to the functions instead. mmdevapi: Integrate wineoss's additions in unixlib.h.