Add support for ATTiny 1606

[hammerlink]

This adds support for the ATTiny 1606

[Rahix]

Hi, thanks a lot for your contribution! Just a heads-up, I am holding off merging new chips right now until #157 is merged, which quite significantly changes the way the register definitions are generated. I will ping you once this change has landed so you can rebase your changes ontop of it.

[Rahix]

Here's the notification: #157 was merged 🎉 Please rebase your work ontop of the new code-generation. You should be able to make out the new structure in src/devices/mod.rs from the way things look for the existing chips. The Makefile is dropped completely.

[hammerlink]

@Rahix Looks like a great improvement! I have rebased it, I indeed needed to change src/devices & remove the Makefile.

[Rahix]

This line is now superfluous due to the build-system changes. If you don't have any other patches to add, please drop the patch/attiny1606.yaml file entirely.

[hammerlink]

Ok, removed it