lenovo/legion/16arha7: fix kernel check for speaker patch

[8bitbuddhist]

Description of changes

This fixes an incorrect comparison between kernel versions, which resulted in a build error. Now, we'll only apply the patch if the kernel version is below 6.10 (i.e. 6.9.X or older).

Things done

• [X] Tested the changes in your own NixOS Configuration
• [X] Tested the changes end-to-end by using your fork of nixos-hardware and importing it via <nixos-hardware> or Flake input