default or selected kernelversion does not have config value CONFIG_DMA_REMAP.
Result is shown for kernelversion 6.9.9

CONFIG_DMA_REMAP (not configurable)

modulename: remap.ko

configname: CONFIG_DMA_REMAP

Linux Kernel Configuration
└─>Library routines
└─>DMA_REMAP
In linux kernel since version 5 (release Date: 2019-03-03)  
source code:
kernel/dma/remap.c

depends
CONFIG_MMU