default or selected kernelversion does not have config value CONFIG_HW_RANDOM_BCM63XX.
Result is shown for kernelversion 6.7-rc3

Broadcom BCM63xx Random Number Generator support

modulename: bcm63xx-rng.ko

configname: CONFIG_HW_RANDOM_BCM63XX

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Hardware Random Number Generator Core support
└─>Broadcom BCM63xx Random Number Generator support
In linux kernel since version 3.1 (release Date: 2011-10-24)  
This driver provides kernel-side support for the Random Number
Generator hardware found on the Broadcom BCM63xx SoCs.

To compile this driver as a module, choose M here: the
module will be called bcm63xx-rng

If unusure, say Y.

source code: