Currently, the mobile client doesn't gather enough information for points to be computed. To add the two together, some additional data would need to be gathered.
At the present time, I think the mobile client only tracks the number of hours you're running it. I don't think it knows how many CPUs you have or how fast they are, etc. so it gives a poor measurement of scientific progress. Also, there's no information gathered about how rapidly you were able to do a more difficult project, compared to a simpler project nor has there been any scaling to compare how difficult a CPU or GPU project is to a NaCl project is.
The points for the PC client are based on the difficulty of the project as well as the elapsed time before you return a completed project, giving more points for completing difficult tasks more promptly and fewer points if a similar project is returned more slowly or if an easier task is completed.
Any plan to add the two together would require converting the reported data to the same unit-of-measure.