uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/misc/umr/default.nix

@@ -0,0 +1,37 @@
+{ lib, stdenv, fetchgit, bash-completion, cmake, pkg-config
+, libdrm, libpciaccess, llvmPackages, ncurses
+}:
+
+stdenv.mkDerivation rec {
+  pname = "umr";
+  version = "unstable-2021-02-18";
+
+  src = fetchgit {
+    url = "https://gitlab.freedesktop.org/tomstdenis/umr";
+    rev = "79e17f8f2807ed707fc1be369d0aad536f6dbc97";
+    sha256 = "IwTkHEuJ82hngPjFVIihU2rSolLBqHxQTNsP8puYPaY=";
+  };
+
+  nativeBuildInputs = [ cmake pkg-config llvmPackages.llvm.dev ];
+
+  buildInputs = [
+    bash-completion
+    libdrm
+    libpciaccess
+    llvmPackages.llvm
+    ncurses
+  ];
+
+  # Remove static libraries (there are no dynamic libraries in there)
+  postInstall = ''
+    rm -r $out/lib
+  '';
+
+  meta = with lib; {
+    description = "A userspace debugging and diagnostic tool for AMD GPUs";
+    homepage = "https://gitlab.freedesktop.org/tomstdenis/umr";
+    license = licenses.mit;
+    maintainers = with maintainers; [ Flakebi ];
+    platforms = platforms.linux;
+ };
+}