CONFIG_ARCH_BCM_HR2 is not available for the default architecture x86.
Result is shown for architecture arm

Broadcom Hurricane 2 SoC support

modulename: bcm_hr2.ko
configname: CONFIG_ARCH_BCM_HR2

Linux Kernel Configuration
└─> Broadcom SoC Support
└─> Broadcom Hurricane 2 SoC support

Enable support for the Hurricane 2 family,
which includes the following variants:
BCM53342, BCM53343, BCM53344, BCM53346.

source code: