default or selected kernelversion does not have config value CONFIG_I2C_BCM2048.
Result is shown for kernelversion 6.9.9

Broadcom BCM2048 FM Radio Receiver support

modulename: radio-bcm2048.ko

configname: CONFIG_I2C_BCM2048

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Media staging drivers
└─>Multimedia support
└─>Radio Adapters
└─>Broadcom BCM2048 FM Radio Receiver support
In linux kernel since version 3.14 (release Date: 2014-03-30)  
Say Y here if you want support to BCM2048 FM Radio Receiver.
This device driver supports only i2c bus.

To compile this driver as a module, choose M here: the
module will be called radio-bcm2048.

source code: