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

CONFIG_ARCH_BCM_MOBILE_SMC (not configurable)

modulename: bcm_kona_smc.ko

configname: CONFIG_ARCH_BCM_MOBILE_SMC

Linux Kernel Configuration
└─>Broadcom SoC Support
└─>Broadcom Mobile SoC Selection
└─>ARCH_BCM_MOBILE_SMC
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
arch/arm/mach-bcm/bcm_kona_smc.c