[fprint] elan patch + poc 0x903 and 0x0C03

[Sébastien Béchet]

On 17-01-18 19:21, Igor Filatov wrote:
> We didn't have the spec before so I had no idea how different devices 
> worked. Especially given that some commands which worked fine for me 
> produced errors one other devices. Now that we have the docs I'll work 
> on adapting the driver. Naturally, any info you have is welcome and so 
> is any help with testing.

I have done the 
[synthesis](https://github.com/sbechet/elanfp/blob/master/README.md) 
about all informations we have a prepare questions for KT.

Please complete.