Remove buildUBoot function from U-Boot build

The buildUBoot function is intended for internal use and is dedicated
for Raspberry Pi platforms. With latest nixpkgs it is causing
build failure in older uboot(prior to v2023.07) due to a Raspberry Pi patch.

Now this function is not used for the U-Boot build.

More Information:
https://github.com/NixOS/nixpkgs/pull/311614
https://github.com/NixOS/nixpkgs/pull/146634

Signed-off-by: Ganga Ram <Ganga.Ram@tii.ae>

nxp/imx8mp-evk/bsp/imx8mp-uboot.nix

@@ -1,17 +1,55 @@
-{pkgs}:
+{ stdenv
-with pkgs; let
+, lib
-  inherit buildUBoot;
+, bison
-in
+, dtc
-  (buildUBoot {
+, fetchgit
-    pname = "imx8mp-uboot";
+, flex
-    version = "2023.04";
+, gnutls
-
+, libuuid
-    src = fetchgit {
+, ncurses
+, openssl
+, which
+, perl
+, buildPackages
+}:
+let
+  ubsrc = fetchgit {
       url = "https://github.com/nxp-imx/uboot-imx.git";
       # tag: "lf-6.1.55-2.2.0"
       rev = "49b102d98881fc28af6e0a8af5ea2186c1d90a5f";
       sha256 = "sha256-1j6X82DqezEizeWoSS600XKPNwrQ4yT0vZuUImKAVVA=";
     };
+in
+  (stdenv.mkDerivation {
+    pname = "imx8mp-uboot";
+    version = "2023.04";
+    src = ubsrc;
+
+    postPatch = ''
+      patchShebangs tools
+      patchShebangs scripts
+    '';
+
+    nativeBuildInputs = [
+      bison
+      flex
+      openssl
+      which
+      ncurses
+      libuuid
+      gnutls
+      openssl
+      perl
+    ];
+
+    depsBuildBuild = [ buildPackages.stdenv.cc ];
+    hardeningDisable = [ "all" ];
+    enableParallelBuilding = true;
+
+    makeFlags = [
+      "DTC=${lib.getExe buildPackages.dtc}"
+      "CROSS_COMPILE=${stdenv.cc.targetPrefix}"
+    ];
 
   	extraConfig = ''
       CONFIG_USE_BOOTCOMMAND=y
@@ -25,17 +63,28 @@ in
       CONFIG_CMD_CACHE=y
     '';
 
-    enableParallelBuilding = true;
+    passAsFile = [ "extraConfig" ];
-    defconfig = "imx8mp_evk_defconfig";
-    extraMeta.platforms = ["aarch64-linux"];
 
-    filesToInstall = [
+    configurePhase = ''
-      "./u-boot-nodtb.bin"
+      runHook preConfigure
-      "./spl/u-boot-spl.bin"
+
-      "./arch/arm/dts/imx8mp-evk.dtb"
+      make imx8mp_evk_defconfig
-      ".config"
+      cat $extraConfigPath >> .config
-    ];
+
-  })
+      runHook postConfigure
-  .overrideAttrs (old: {
+    '';
-    nativeBuildInputs = old.nativeBuildInputs ++ [pkgs.perl];
+
+    installPhase = ''
+      runHook preInstall
+
+      mkdir -p $out
+      cp ./u-boot-nodtb.bin $out
+      cp ./spl/u-boot-spl.bin $out
+      cp ./arch/arm/dts/imx8mp-evk.dtb $out
+      cp .config  $out
+
+      runHook postInstall
+    '';
+
+    dontStrip = true;
   })

nxp/imx8mq-evk/bsp/imx8mq-uboot.nix

@@ -1,17 +1,55 @@
-{pkgs}:
+{ stdenv
-with pkgs; let
+, lib
-  inherit buildUBoot;
+, bison
-in
+, dtc
-  (buildUBoot {
+, fetchgit
-    pname = "imx8mq-uboot";
+, flex
-    version = "2023.04";
+, gnutls
-
+, libuuid
-    src = fetchgit {
+, ncurses
+, openssl
+, which
+, perl
+, buildPackages
+}:
+let
+  ubsrc = fetchgit {
       url = "https://github.com/nxp-imx/uboot-imx.git";
       # tag: "lf-6.1.55-2.2.0"
       rev = "49b102d98881fc28af6e0a8af5ea2186c1d90a5f";
       sha256 = "sha256-1j6X82DqezEizeWoSS600XKPNwrQ4yT0vZuUImKAVVA=";
     };
+in
+  (stdenv.mkDerivation {
+    pname = "imx8mq-uboot";
+    version = "2023.04";
+    src = ubsrc;
+
+    postPatch = ''
+      patchShebangs tools
+      patchShebangs scripts
+    '';
+
+    nativeBuildInputs = [
+      bison
+      flex
+      openssl
+      which
+      ncurses
+      libuuid
+      gnutls
+      openssl
+      perl
+    ];
+
+    depsBuildBuild = [ buildPackages.stdenv.cc ];
+    hardeningDisable = [ "all" ];
+    enableParallelBuilding = true;
+
+    makeFlags = [
+      "DTC=${lib.getExe buildPackages.dtc}"
+      "CROSS_COMPILE=${stdenv.cc.targetPrefix}"
+    ];
 
   	extraConfig = ''
       CONFIG_USE_BOOTCOMMAND=y
@@ -25,17 +63,28 @@ in
       CONFIG_CMD_CACHE=y
     '';
 
-    enableParallelBuilding = true;
+    passAsFile = [ "extraConfig" ];
-    defconfig = "imx8mq_evk_defconfig";
-    extraMeta.platforms = ["aarch64-linux"];
 
-    filesToInstall = [
+    configurePhase = ''
-      "./u-boot-nodtb.bin"
+      runHook preConfigure
-      "./spl/u-boot-spl.bin"
+
-      "./arch/arm/dts/imx8mq-evk.dtb"
+      make imx8mq_evk_defconfig
-      ".config"
+      cat $extraConfigPath >> .config
-    ];
+
-  })
+      runHook postConfigure
-  .overrideAttrs (old: {
+    '';
-    nativeBuildInputs = old.nativeBuildInputs ++ [pkgs.perl];
+
+    installPhase = ''
+      runHook preInstall
+
+      mkdir -p $out
+      cp ./u-boot-nodtb.bin $out
+      cp ./spl/u-boot-spl.bin $out
+      cp ./arch/arm/dts/imx8mq-evk.dtb $out
+      cp .config  $out
+
+      runHook postInstall
+    '';
+
+    dontStrip = true;
   })