CONFIG_ARC_HAS_BVCI_LAT_UNIT is not available for thedefaultarchitecture x86.
Result is shown for architecture arc
default or selected kernelversion does not have config value CONFIG_ARC_HAS_BVCI_LAT_UNIT.
Result is shown for kernelversion 6.5.1

BVCI Bus Latency Unit


Linux Kernel Configuration
└─>"Legacy" ARC FPGA dev Boards
└─>BVCI Bus Latency Unit
In linux kernel since version 3.1 (release Date: 2011-10-24)  
IP to add artificial latency to BVCI Bus Based FPGA builds.
The default latency (even worst case) for FPGA is non-realistic
(~10 SDRAM, ~5 SSRAM).