default or selected kernelversion does not have config value CONFIG_SFI.
Result is shown for kernelversion 6.8.2

SFI (Simple Firmware Interface) Support

modulename: sfi.ko

configname: CONFIG_SFI

Linux Kernel Configuration
└─>Power management and ACPI options
└─>SFI (Simple Firmware Interface) Support
In linux kernel since version 3.10 (release Date: 2013-06-30)  
The Simple Firmware Interface (SFI) provides a lightweight method
for platform firmware to pass information to the operating system
via static tables in memory. Kernel SFI support is required to
boot on SFI-only platforms. Currently, all SFI-only platforms are
based on the 2nd generation Intel Atom processor platform,
code-named Moorestown.

For more information, see http://simplefirmware.org

Say 'Y' here to enable the kernel to boot on SFI-only platforms.

source code:
is selected by
CONFIG_APB_TIMER