CONFIG_BOOT_LOAD_BOOL is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
default or selected kernelversion does not have config value CONFIG_BOOT_LOAD_BOOL.
Result is shown for kernelversion 5.4.123

Set the boot link/load address

configname: CONFIG_BOOT_LOAD_BOOL

Linux/PowerPC Kernel Configuration
└─>Advanced setup
└─>Set the boot link/load address
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
This option allows you to set the initial load address of the zImage
or zImage.initrd file. This can be useful if you are on a board
which has a small amount of memory.

Say N here unless you know what you are doing.

depends
CONFIG_ADVANCED_OPTIONS
CONFIG_PPC32
NOT CONFIG_PPC_MULTIPLATFORM