default or selected kernelversion does not have config value CONFIG_BD79703.
Result is shown for kernelversion 6.14-rc1

ROHM Semiconductor BD79703 DAC driver

modulename: rohm-bd79703.ko

configname: CONFIG_BD79703

Linux Kernel Configuration
└─>Device Drivers
└─>Industrial I/O support
└─>Digital to analog converters
└─>SPI support
└─>ROHM Semiconductor BD79703 DAC driver
Say yes here to build support for ROHM Semiconductor BD79703 Digital
to Analog Converter (DAC).

source code: