CONFIG_X86_PLATFORM_DEVICES is not available for the default architecture x86.
Result is shown for architecture i386

X86 Platform Specific Device Drivers


Linux Kernel Configuration
└─> Device Drivers
└─> X86 Platform Specific Device Drivers

Say Y here to get to see options for device drivers for various
x86 platforms, including vendor-specific laptop extension drivers.
This option alone does not add any kernel code.

If you say N, all options in this submenu will be skipped and disabled.