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/tools/build-managers/gn/rev1924.nix

@@ -0,0 +1,8 @@
+{ callPackage, ... } @ args:
+
+callPackage ./generic.nix args {
+  rev = "24e2f7df92641de0351a96096fb2c490b2436bb8";
+  revNum = "1924"; # git describe HEAD --match initial-commit | cut -d- -f3
+  version = "2021-08-08";
+  sha256 = "1lwkyhfhw0zd7daqz466n7x5cddf0danr799h4jg3s0yvd4galjl";
+}