src/kernel: use 5.10.148 on all platforms

This commit bumps the kgpe and am1i platforms to 5.10.148 for the
pre-kexec() kernel, so all platforms now use the same version.

src/kernel/default.nix

@@ -8,8 +8,8 @@
 
 let
   inherit (nixpkgsOnBuildForHost) stdenv;
-  version = "5.4.218";
-  hash = "sha256-Pd10AoU31newwCsXz9+IH06933VVJsy5zX+Yg3Gp9Dg=";
+  version = "5.10.148";
+  hash = "sha256-ElI/a+IhBnCU7FQbGWvOcEk/f0TwMbPEcR2C4pDG6VY=";
 in stdenv.mkDerivation {
   pname = "linux";
   inherit version;
@@ -38,7 +38,7 @@ in stdenv.mkDerivation {
   nativeBuildInputs =
     with nixpkgsOnBuildForBuild;
     [ perl bc nettools openssl rsync gmp libmpc mpfr gawk zstd python3Minimal
-      kmod bison flex libelf cpio pahole zlib elfutils ];
+      kmod bison flex elfutils cpio pahole zlib elfutils ];
   hardeningDisable = [ "all" ];
 
   # crypto/jitterentropy.c:54:3: error: #error "The CPU Jitter random

src/platform/kevin/default.nix

@@ -39,19 +39,10 @@ in {
     platform_name = "kevin";
 
     kernel =
-      let
-        version = "5.10.148";
-        hash = "sha256-ElI/a+IhBnCU7FQbGWvOcEk/f0TwMbPEcR2C4pDG6VY=";
-      in
       final.lib.makeOverridable (prev.kernel.override {
         config = ./linux.config;
         buildTargets = [ "Image" "dtbs" ];
       }).overrideAttrs (a: {
-        inherit version;
-        src = final.nixpkgsOnBuildForBuild.fetchurl {
-          url = "mirror://kernel/linux/kernel/v5.x/linux-${version}.tar.xz";
-          inherit hash;
-        };
         postInstall = (a.postInstall or "") + ''
           lzma < arch/arm64/boot/Image > $out/Image.lzma
           cp arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dtb $out/