CONFIG_ARCH_BCM_281XX is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Broadcom BCM281XX SoC family
modulename: board_bcm281xx.ko
configname: CONFIG_ARCH_BCM_281XX
Linux Kernel Configuration
└─>Broadcom SoC Support
└─>Broadcom Mobile SoC Selection
└─>Broadcom BCM281XX SoC family
In linux kernel since version 3.10 (release Date: 2013-06-30)
Enable support for the the BCM281XX family, which includes
BCM11130, BCM11140, BCM11351, BCM28145 and BCM28155
variants.
BCM11130, BCM11140, BCM11351, BCM28145 and BCM28155
variants.