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

CONFIG_MFD_DAVINCI_VOICECODEC (not configurable)

modulename: davinci_voicecodec.ko

configname: CONFIG_MFD_DAVINCI_VOICECODEC

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>MFD_DAVINCI_VOICECODEC
In linux kernel since version 2.6.35 (release Date: 2010-08-01)  
source code:
drivers/mfd//davinci_voicecodec.c