CONFIG_DEBUG_BCM_HR2 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Kernel low-level debugging on Hurricane 2 UART2

configname: CONFIG_DEBUG_BCM_HR2

Kernel low-level debugging port
└─>Kernel low-level debugging on Hurricane 2 UART2
In linux kernel since version 4.2 (release Date: 2015-08-30)