default or selected kernelversion does not have config value CONFIG_MTD_MT81xx_NOR.
Result is shown for kernelversion 6.9.9

Mediatek MT81xx SPI NOR flash controller

modulename: mtk-quadspi.ko

configname: CONFIG_MTD_MT81xx_NOR

Linux Kernel Configuration
└─>Device Drivers
└─>Memory Technology Device (MTD) support
└─>SPI-NOR device support
└─>Mediatek MT81xx SPI NOR flash controller
In linux kernel since version 4.1 (release Date: 2015-06-21)  
This enables access to SPI NOR flash, using MT81xx SPI NOR flash
controller. This controller does not support generic SPI BUS, it only
supports SPI NOR Flash.

source code: