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/embedded/platformio/missing-udev-rules-nixos.patch

@@ -0,0 +1,12 @@
+diff --git a/platformio/exception.py b/platformio/exception.py
+index ef1d3bab..445174fc 100644
+--- a/platformio/exception.py
++++ b/platformio/exception.py
+@@ -57,6 +57,7 @@ class MissedUdevRules(InvalidUdevRules):
+     MESSAGE = (
+         "Warning! Please install `99-platformio-udev.rules`. \nMore details: "
+         "https://docs.platformio.org/page/faq.html#platformio-udev-rules"
++        "On NixOS add the platformio package to services.udev.packages"
+     )
+ 
+