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>

nixos/doc/manual/configuration/file-systems.chapter.md

@@ -0,0 +1,42 @@
+# File Systems {#ch-file-systems}
+
+You can define file systems using the `fileSystems` configuration
+option. For instance, the following definition causes NixOS to mount the
+Ext4 file system on device `/dev/disk/by-label/data` onto the mount
+point `/data`:
+
+```nix
+fileSystems."/data" =
+  { device = "/dev/disk/by-label/data";
+    fsType = "ext4";
+  };
+```
+
+This will create an entry in `/etc/fstab`, which will generate a
+corresponding [systemd.mount](https://www.freedesktop.org/software/systemd/man/systemd.mount.html)
+unit via [systemd-fstab-generator](https://www.freedesktop.org/software/systemd/man/systemd-fstab-generator.html).
+The filesystem will be mounted automatically unless `"noauto"` is
+present in [options](#opt-fileSystems._name_.options). `"noauto"`
+filesystems can be mounted explicitly using `systemctl` e.g.
+`systemctl start data.mount`. Mount points are created automatically if they don't
+already exist. For `device`, it's best to use the topology-independent
+device aliases in `/dev/disk/by-label` and `/dev/disk/by-uuid`, as these
+don't change if the topology changes (e.g. if a disk is moved to another
+IDE controller).
+
+You can usually omit the file system type (`fsType`), since `mount` can
+usually detect the type and load the necessary kernel module
+automatically. However, if the file system is needed at early boot (in
+the initial ramdisk) and is not `ext2`, `ext3` or `ext4`, then it's best
+to specify `fsType` to ensure that the kernel module is available.
+
+::: {.note}
+System startup will fail if any of the filesystems fails to mount,
+dropping you to the emergency shell. You can make a mount asynchronous
+and non-critical by adding `options = [ "nofail" ];`.
+:::
+
+```{=docbook}
+<xi:include href="luks-file-systems.section.xml" />
+<xi:include href="sshfs-file-systems.section.xml" />
+```