default or selected kernelversion does not have config value CONFIG_SAMSUNG_USBPHY.
Result is shown for kernelversion 6.5.1

CONFIG_SAMSUNG_USBPHY (not configurable)

modulename: phy-samsung-usb.ko

configname: CONFIG_SAMSUNG_USBPHY

Linux Kernel Configuration
└─>Device Drivers
└─>USB support
└─>USB Physical Layer drivers
└─>SAMSUNG_USBPHY
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Enable this to support Samsung USB phy helper driver for Samsung SoCs.
This driver provides common interface to interact, for Samsung USB 2.0 PHY
driver and later for Samsung USB 3.0 PHY driver.

source code:
drivers/usb/phy/phy-samsung-usb.c