default or selected kernelversion does not have config value CONFIG_MTD_NAND_BASLER_EXCITE.
Result is shown for kernelversion 5.4.159

Support for NAND Flash on Basler eXcite

modulename: excite_nandflash.ko

configname: CONFIG_MTD_NAND_BASLER_EXCITE

Linux Kernel Configuration
└─>Device Drivers
└─>Memory Technology Device (MTD) support
└─>NAND Device Support
└─>Support for NAND Flash on Basler eXcite
In linux kernel since version 2.6.21.1 (release Date: 2007-04-27)  
This enables the driver for the NAND flash device found on the
Basler eXcite Smart Camera. If built as a module, the driver
will be named excite_nandflash.

source code: