raspberry-pi: replace lib.overrideDerivation with .overrideAttrs

lib.overrideDerivation is deprecated and strips passthru attributes
(.configfile, .moduleBuildDependencies, etc.) from the kernel
derivation, which breaks downstream users expecting a standard
buildLinux output.

.overrideAttrs preserves passthru and matches every other custom
kernel in this repo.

Author: JamieMagee

raspberry-pi/common/kernel.nix

@@ -14,10 +14,9 @@ let
   tag = "stable_20250916";
   hash = "sha256-HG8Oc04V2t54l0SOn4gKmNJWQUrZfjWusgKcWvx74H0==";
 in
-lib.overrideDerivation
-  (buildLinux (
-    args
-    // {
+(buildLinux (
+  args
+  // {
       version = "${modDirVersion}-${tag}";
       inherit modDirVersion;
       pname = "linux-rpi";
@@ -64,8 +63,7 @@ lib.overrideDerivation
       ignoreConfigErrors = true;
     }
     // (args.argsOverride or { })
-  ))
-  (_oldAttrs: {
+  )).overrideAttrs {
     postConfigure = ''
       # The v7 defconfig has this set to '-v7' which screws up our modDirVersion.
       sed -i $buildRoot/.config -e 's/^CONFIG_LOCALVERSION=.*/CONFIG_LOCALVERSION=""/'
@@ -110,4 +108,4 @@ lib.overrideDerivation
           copyDTB bcm2710-rpi-cm3.dtb bcm2837-rpi-cm3.dtb
           copyDTB bcm2711-rpi-4-b.dtb bcm2838-rpi-4-b.dtb
         '';
-  })
+  }