CONFIG_ARCH_SUNXI is not available for the selected architecture x86.
Result is shown for architecture arm
Allwinner SoCs
modulename: sunxi.ko
configname: CONFIG_ARCH_SUNXI
Linux Kernel Configuration
└─>Allwinner SoCs
In linux kernel since version 3.1 (release Date: 2011-10-24)
Support for Allwinner ARM-based family of processors