CONFIG_DEBUG_SOCFPGA_ARRIA10_UART1 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Use SOCFPGA Arria10 UART1 for low-level debug

configname: CONFIG_DEBUG_SOCFPGA_ARRIA10_UART1

Kernel low-level debugging port
└─>Use SOCFPGA Arria10 UART1 for low-level debug
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Say Y here if you want kernel low-level debugging support
on SOCFPGA(Arria 10) based platforms.