CONFIG_DT_BCM97125CBMB is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

BCM97125CBMB

configname: CONFIG_DT_BCM97125CBMB

Built-in device tree
└─>BCM97125CBMB
In linux kernel since version 4.1 (release Date: 2015-06-21)