CONFIG_DT_BCM96368MVWG is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

BCM96368MVWG

configname: CONFIG_DT_BCM96368MVWG

Built-in device tree
└─>BCM96368MVWG
In linux kernel since version 4.1 (release Date: 2015-06-21)