default or selected kernelversion does not have config value CONFIG_OLPC_XO1.
Result is shown for kernelversion 5.6.18

OLPC XO-1 support

modulename: olpc-xo1.ko

configname: CONFIG_OLPC_XO1

Linux Kernel Configuration
└─>Bus options (PCI etc.)
└─>OLPC XO-1 support
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
Add support for non-essential features of the OLPC XO-1 laptop.

source code:
arch/x86/platform/olpc/olpc-xo1.c