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/os-specific/linux/tp_smapi/update.nix

@@ -0,0 +1,11 @@
+{ lib, writeScript, coreutils, curl, gnugrep, jq, common-updater-scripts, runtimeShell }:
+
+writeScript "update-tp_smapi" ''
+#!${runtimeShell}
+PATH=${lib.makeBinPath [ common-updater-scripts coreutils curl gnugrep jq ]}
+
+tags=`curl -s https://api.github.com/repos/evgeni/tp_smapi/tags`
+latest_tag=`echo $tags | jq -r '.[] | .name' | grep -oP "^tp-smapi/\K.*" | sort --version-sort | tail -1`
+
+update-source-version linuxPackages.tp_smapi "$latest_tag"
+''