default or selected kernelversion does not have config value CONFIG_SPI_MTK_QUADSPI.
Result is shown for kernelversion 6.9.8

MediaTek Quad SPI controller

modulename: mtk-quadspi.ko

configname: CONFIG_SPI_MTK_QUADSPI

Linux Kernel Configuration
└─>Device Drivers
└─>Memory Technology Device (MTD) support
└─>SPI-NOR device support
└─>MediaTek Quad SPI controller
In linux kernel since version 5.1 (release Date: 2019-05-05)  
This enables support for the Quad SPI controller in master mode.
This controller does not support generic SPI. It only supports
SPI NOR.

source code: