CONFIG_AT91_EARLY_USART0 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_AT91_EARLY_USART0.
Result is shown for kernelversion 6.2.5
USART0
configname: CONFIG_AT91_EARLY_USART0
Select a UART for early kernel messages
└─>USART0