Update Elan driver
As I mentioned in mailing list, there are still some issues:
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Small sensors...
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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.