default or selected kernelversion does not have config value CONFIG_CAIF_SHM.
Result is shown for kernelversion 6.2.5

CAIF shared memory protocol driver

modulename: caif_shm.ko

configname: CONFIG_CAIF_SHM

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>CAIF shared memory protocol driver
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
The CAIF shared memory protocol driver for the STE UX5500 platform.

source code: