Update Elan driver
As I mentioned in mailing list, there are still some issues:
Small sensors...
0903 lock up for some users after a number of consequent captures until the device is power-cycled.
It might be a good idea to put the driver behind a flag but I'm not sure how to best do it. Some models are already enabled in upstream. I don't think there are flags for groups of devices within a single driver currently.