Make the PINx registers writeable
Add patches for ADC peripherals Add a patch to fixup a few registers in the ADC peripheral for ATmega328P, ATmega32U4, ATmega1280, and ATmega64.
Add patch for SPI device
atmega1280: Add remaining common patches
atmega1280: Factor out USART into a common patch Signed-off-by: Rahix <rahix@rahix.de>
Add USART1 patch to atmega1280.