CONFIG_V850E2_FPGA85E2C is not available for thedefaultarchitecture x86.
Result is shown for architecture v850
default or selected kernelversion does not have config value CONFIG_V850E2_FPGA85E2C.
Result is shown for kernelversion 5.19-rc1

NA85E2C-FPGA

modulename: fpga85e2c.ko

configname: CONFIG_V850E2_FPGA85E2C

Platform
└─>NA85E2C-FPGA
In linux kernel since version 2.6.21 (release Date: 2007-04-25)  
source code:
arch/v850/kernel/