uboot: use pname and cleanup version specification

pkgs/misc/uboot/default.nix

@@ -4,7 +4,8 @@
 }:
 
 let
-  buildUBoot = { filesToInstall
+  buildUBoot = { version ? "2018.09"
+            , filesToInstall
             , installDir ? "$out"
             , defconfig
             , extraConfig ? ""
@@ -14,8 +15,8 @@ let
             , ... } @ args:
            stdenv.mkDerivation (rec {
 
-    name = "uboot-${defconfig}-${version}";
-    version = args.version or "2018.09";
+    pname = "uboot-${defconfig}";
+    inherit version;
 
     src = fetchurl {
       url = "ftp://ftp.denx.de/pub/u-boot/u-boot-${version}.tar.bz2";

pkgs/misc/uboot/rock64.nix

@@ -6,7 +6,6 @@
     sha256 = "189f7h6wj2yrcc5ga103jnyysykf9j3j9p1vcy7791bxwxqxnggf";
   };
 in buildUBoot rec {
-  name = "uboot-${defconfig}-${version}";
   version = "2017.09";
 
   src = fetchFromGitHub {

pkgs/misc/uboot/rockpro64.nix

@@ -6,7 +6,6 @@
     sha256 = "189f7h6wj2yrcc5ga103jnyysykf9j3j9p1vcy7791bxwxqxnggf";
   };
 in buildUBoot rec {
-  name = "uboot-${defconfig}-${version}";
   version = "2017.09";
 
   src = fetchFromGitHub {