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/ipv4-config.section.md

@@ -0,0 +1,35 @@
+# IPv4 Configuration {#sec-ipv4}
+
+By default, NixOS uses DHCP (specifically, `dhcpcd`) to automatically
+configure network interfaces. However, you can configure an interface
+manually as follows:
+
+```nix
+networking.interfaces.eth0.ipv4.addresses = [ {
+  address = "192.168.1.2";
+  prefixLength = 24;
+} ];
+```
+
+Typically you'll also want to set a default gateway and set of name
+servers:
+
+```nix
+networking.defaultGateway = "192.168.1.1";
+networking.nameservers = [ "8.8.8.8" ];
+```
+
+::: {.note}
+Statically configured interfaces are set up by the systemd service
+`interface-name-cfg.service`. The default gateway and name server
+configuration is performed by `network-setup.service`.
+:::
+
+The host name is set using [](#opt-networking.hostName):
+
+```nix
+networking.hostName = "cartman";
+```
+
+The default host name is `nixos`. Set it to the empty string (`""`) to
+allow the DHCP server to provide the host name.