Added Rahix/avr-device to Peripheral Access Crate list

Author: jonahbron

README.md

@@ -120,6 +120,7 @@ Peripheral Access Crates were also called Device Crates.
 
 - [`atsamd21`](https://github.com/atsamd-rs/atsamd) Peripheral access API for Microchip (formerly Atmel) SAMD21 microcontrollers.  This git repo hosts both the peripheral access crate and the hal.
 - [`atsamd51`](https://github.com/atsamd-rs/atsamd) Peripheral access API for Microchip (formerly Atmel) SAMD51 microcontrollers.  This git repo hosts both the peripheral access crate and the hal.
+- [`avr-device`](https://github.com/Rahix/avr-device) Peripheral access API for Microchip (formerly Atmel) AVR microcontroller family.
 - [`sam3x8e`](https://crates.io/crates/sam3x8e) Peripheral access API for Atmel SAMD3X8E microcontrollers (generated using svd2rust)  - ![crates.io](https://img.shields.io/crates/v/sam3x8e.svg)
 
 ### Nordic