CONFIG_ARC_HAS_BVCI_LAT_UNIT is not available for the default architecture 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 3.9.9

BVCI Bus Latency Unit


Linux Kernel Configuration
└─> "Legacy" ARC FPGA dev Boards
└─> BVCI Bus Latency Unit

IP to add artifical latency to BVCI Bus Based FPGA builds.
The default latency (even worst case) for FPGA is non-realistic
(~10 SDRAM, ~5 SSRAM).