The INT0 and INT1 fields in the EIMSK register were incorrectly
combined into a 2 bit field, split into individual bits
Allowed write access to PRR0 and PRR1 in atmega328pb
I downloaded the atmega328pb datasheet and compared with the generated svd. It had the same problems with the EIMSK and PRR registers (multiple in this case). So I went ahead and added those also.
The INT0 and INT1 fields in the EIMSK register were incorrectly combined into a 2 bit field, split into individual bits Allowed write access to PRR0 and PRR1 in atmega328pb