CONFIG_ARCH_SUNXI_MC_SMP is not available for the selected architecture x86.
Result is shown for architecture arm

CONFIG_ARCH_SUNXI_MC_SMP (not configurable)

modulename: mc_smp.ko

configname: CONFIG_ARCH_SUNXI_MC_SMP

Linux Kernel Configuration
└─>Allwinner SoCs
└─>ARCH_SUNXI_MC_SMP
In linux kernel since version 3.10 (release Date: 2013-06-30)
source code:
/arch/arm/mach-sunxi/