framework/12-inch: Fix tabletmode on some kernels

NixOS kernels don't have pinctrl_tigerlake built-in, we need to make
sure it loads before soc_button_array. Adding it to the initrd ensures
that.

Signed-off-by: Daniel Schaefer <git@danielschaefer.me>

Author: JohnAZoidberg

framework/12-inch/13th-gen-intel/default.nix

@@ -4,4 +4,10 @@
     ../common
     ../../../common/cpu/intel
   ];
+
+  # If this module isn't built into the kernel, we need to make sure it loads
+  # before soc_button_array. Otherwise the tablet mode gpio doesn't work.
+  # If correctly loaded, dmesg should show
+  # input: gpio-keys as /devices/platform/INT33D3:00
+  boot.initrd.kernelModules = [ "pinctrl_tigerlake" ];
 }