Specifically mentions only two EIDE interfaces are probed for. This was true for previous (2.0.34) releases only. See /usr/doc/HOWTO/mini/Ultra-DMA, section 5.1, which is accurate. [not connected with Promise]
Sorry for the problem. This list is in need of updating and will be done soon due to the release of the new 2.2 kernel. Please bear with us.