CONFIG_ARCH_MSTARV7 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

MStar/Sigmastar Armv7 SoC Support

modulename: mstarv7.ko


Linux Kernel Configuration
└─>MStar/Sigmastar Armv7 SoC Support
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
Support for newer MStar/Sigmastar SoC families that are
based on Armv7 cores like the Cortex A7 and share the same
basic hardware like the infinity and mercury series.

source code: