CONFIG_LOADER_U_BOOT is not available for thedefaultarchitecture x86.
Result is shown for architecture avr32
default or selected kernelversion does not have config value CONFIG_LOADER_U_BOOT.
Result is shown for kernelversion 6.5.1
U-Boot (or similar) bootloader
configname: CONFIG_LOADER_U_BOOT
Boot loader type
└─>U-Boot (or similar) bootloader