Upgrade to avr-device version 0.3.4

Author: Rahix

avr-hal-generic/Cargo.toml

@@ -9,7 +9,7 @@ cfg-if = "0.1.7"
 nb = "0.1.2"
 ufmt = "0.1.0"
 paste = "1.0.0"
-avr-device = "0.3.3"
+avr-device = "0.3.4"
 
 [dependencies.embedded-hal]
 version = "0.2.3"