CONFIG_ARCH_SPRD is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64
Spreadtrum SoC platform
configname: CONFIG_ARCH_SPRD
Linux Kernel Configuration
└─>Platform selection
└─>Spreadtrum SoC platform
In linux kernel since version 4.1 (release Date: 2015-06-21)
Support for Spreadtrum ARM based SoCs