Disclaimer: I don't have a P45.
Presumably, it should be possible to transfer the data to the iPad with the camera kit and an USB card reader: put the CF card into the card reader, attach the card reader to the camera kit and the iPad should read what is in the dcim folder. Alternatively, use a SD card via a SD to CF adapter in the P45, I use one of those in my Hasselblad. That is my idea to solve the first part of the puzzle. I may be wrong, but it is worth a try. It is much simpler than playing with eye-fi cards.
The second part of the puzzle is to get the iPad to do something with the P45 raw file (the P45 does not output jpegs, right?). That might prove more difficult, as the Phase one raw format is not recognised by Apple, as far as I know.