AVRxt (ATTINY 0-/1-Series)

[dpurgert]

Add entries to devices.c & include/tn###def.inc for:

• 0-series Tiny 202/4, 402/4/6
• 1-series Tiny 212/4, 412/4/6

Tested compiling, but I don't have hardware samples of all of them ...

[dpurgert]

Scratch this, I grabbed the wrong branch :(