default or selected kernelversion does not have config value CONFIG_WESTBRIDGE_BLOCK_DRIVER.
Result is shown for kernelversion 5.6.18
West Bridge Block Driver
modulename: cyasblkdev.ko
configname: CONFIG_WESTBRIDGE_BLOCK_DRIVER
Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>West Bridge Astoria support
└─>West Bridge Block Driver
In linux kernel since version 2.6.37 (release Date: 2011-01-04)
Include the West Bridge based block driver