CONFIG_KERNEL_LOAD_ADDRESS is not available for thedefaultarchitecture x86.
Result is shown for architecture xtensa

Kernel load address

configname: CONFIG_KERNEL_LOAD_ADDRESS

Linux Kernel Configuration
└─>Platform options
└─>Kernel load address
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This is the address where the kernel is loaded.
It is virtual address for MMUv2 configurations and physical address
for all other configurations.

If unsure, leave the default value here.