CONFIG_DMABOUNCE is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_DMABOUNCE.
Result is shown for kernelversion 6.9.9

CONFIG_DMABOUNCE (not configurable)

modulename: dmabounce.ko

configname: CONFIG_DMABOUNCE

Linux Kernel Configuration
└─>DMABOUNCE
In linux kernel since version 2.6.12  
source code:
arch/arm/common/dmabounce.c
selects
CONFIG_ZONE_DMA