default or selected kernelversion does not have config value CONFIG_PHY_MT65XX_USB3.
Result is shown for kernelversion 6.4.14
Mediatek USB3.0 PHY Driver
modulename: phy-mt65xx-usb3.ko
configname: CONFIG_PHY_MT65XX_USB3
Linux Kernel Configuration
└─>Device Drivers
└─>PHY Subsystem
└─>Device Tree and Open Firmware support
└─>Mediatek USB3.0 PHY Driver
In linux kernel since version 4.1 (release Date: 2015-06-21)
Say 'Y' here to add support for Mediatek USB3.0 PHY driver,
it supports multiple usb2.0 and usb3.0 ports.
it supports multiple usb2.0 and usb3.0 ports.