turny: fix SPI/GPIO config for newer kernels

- Add complete config.txt settings with u-boot boot lines + spi=on
- Override sdImage.populateFirmwareCommands to use configtxt module output
- Mount firmware partition and add activation script to sync config.txt
- Load spi_bcm2835 and bcm2835_gpiomem kernel modules
- Add udev rule for gpiomem subsystem (not just gpio)
- Relax ProtectKernelTunables so service can access GPIO
- Update turny flake input to rppal-based CS pin fix

home/jokke/default.nix

@@ -20,7 +20,7 @@
       gimp
       lftp
       inkscape
-      wineWowPackages.waylandFull
+      wineWow64Packages.waylandFull
       reaper
       inputs.ksoloti-pr.legacyPackages.${pkgs.stdenv.hostPlatform.system}.ksoloti
       calibre