default or selected kernelversion does not have config value CONFIG_AIM_CDEV.
Result is shown for kernelversion 5.9.9

Cdev AIM

modulename: aim_cdev.ko
configname: CONFIG_AIM_CDEV

Linux Kernel Configuration
└─> Device Drivers
└─> Staging drivers
└─> MOST driver
└─> Cdev AIM

Say Y here if you want to commumicate via character devices.

To compile this driver as a module, choose M here: the
module will be called aim_cdev.

source code: