default or selected kernelversion does not have config value CONFIG_PHY_QCOM_IPQ806X_USB.
Result is shown for kernelversion 6.9-rc4

Qualcomm IPQ806x DWC3 USB PHY driver

modulename: phy-qcom-ipq806x-usb.ko

configname: CONFIG_PHY_QCOM_IPQ806X_USB

Linux Kernel Configuration
└─>Device Drivers
└─>PHY Subsystem
└─>Device Tree and Open Firmware support
└─>Qualcomm IPQ806x DWC3 USB PHY driver
In linux kernel since version 5.1 (release Date: 2019-05-05)  
This option enables support for the Synopsis PHYs present inside the
Qualcomm USB3.0 DWC3 controller on ipq806x SoC. This driver supports
both HS and SS PHY controllers.

source code:

depends
CONFIG_HAS_IOMEM
CONFIG_OF
CONFIG_ARCH_QCOM or CONFIG_COMPILE_TEST