CONFIG_XIP_PHYS_ADDR is not available for the selected architecture x86.
Result is shown for architecture riscv

XIP Kernel Physical Location

configname: CONFIG_XIP_PHYS_ADDR

Linux Kernel Configuration
└─>Boot options
└─>XIP Kernel Physical Location
In linux kernel since version 2.6.12 )
This is the physical address in your flash memory the kernel will
be linked for and stored to. This address is dependent on your
own flash usage.