kernelconfig_penguin
CONFIG_HAVE_AT91_DBGU1 is not available for the default architecture x86.
Result is shown for architecture arm

is depended by
CONFIG_SOC_SAMA5D3

CONFIG_HAVE_AT91_DBGU1 (not configurable)

configname: CONFIG_HAVE_AT91_DBGU1

Linux Kernel Configuration
└─> HAVE_AT91_DBGU1