default or selected kernelversion does not have config value CONFIG_MTD_NAND_TANGO.
Result is shown for kernelversion 6.9.9

NAND Flash support for Tango chips

modulename: tango_nand.ko

configname: CONFIG_MTD_NAND_TANGO

Linux Kernel Configuration
└─>Device Drivers
└─>Memory Technology Device (MTD) support
└─>Raw/Parallel NAND Device Support
└─>NAND Flash support for Tango chips
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Enables the NAND Flash controller on Tango chips.

source code:
drivers/mtd/nand//raw/tango_nand.c