atmega-hal: Add support for ATmega8U2 v2

Rahix / avr-hal

embedded-hal abstractions for AVR microcontrollers

Apache License 2.0

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atmega-hal: Add support for ATmega8U2 v2 #568

Open supersimple33 opened 3 months ago

supersimple33 commented 3 months ago

Ok so this currently compiles but I don't have an ATMega8u2 to test it on. This pr is all based on #170 and #160 by @drmorr0 with updates to use the newer version of avr-device which now implements ATMega8u2.