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/modules/system/boot/modprobe.nix

@@ -0,0 +1,70 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+
+  ###### interface
+
+  options = {
+
+    boot.blacklistedKernelModules = mkOption {
+      type = types.listOf types.str;
+      default = [];
+      example = [ "cirrusfb" "i2c_piix4" ];
+      description = ''
+        List of names of kernel modules that should not be loaded
+        automatically by the hardware probing code.
+      '';
+    };
+
+    boot.extraModprobeConfig = mkOption {
+      default = "";
+      example =
+        ''
+          options parport_pc io=0x378 irq=7 dma=1
+        '';
+      description = ''
+        Any additional configuration to be appended to the generated
+        <filename>modprobe.conf</filename>.  This is typically used to
+        specify module options.  See
+        <citerefentry><refentrytitle>modprobe.d</refentrytitle>
+        <manvolnum>5</manvolnum></citerefentry> for details.
+      '';
+      type = types.lines;
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf (!config.boot.isContainer) {
+
+    environment.etc."modprobe.d/ubuntu.conf".source = "${pkgs.kmod-blacklist-ubuntu}/modprobe.conf";
+
+    environment.etc."modprobe.d/nixos.conf".text =
+      ''
+        ${flip concatMapStrings config.boot.blacklistedKernelModules (name: ''
+          blacklist ${name}
+        '')}
+        ${config.boot.extraModprobeConfig}
+      '';
+    environment.etc."modprobe.d/debian.conf".source = pkgs.kmod-debian-aliases;
+
+    environment.etc."modprobe.d/systemd.conf".source = "${config.systemd.package}/lib/modprobe.d/systemd.conf";
+
+    environment.systemPackages = [ pkgs.kmod ];
+
+    system.activationScripts.modprobe = stringAfter ["specialfs"]
+      ''
+        # Allow the kernel to find our wrapped modprobe (which searches
+        # in the right location in the Nix store for kernel modules).
+        # We need this when the kernel (or some module) auto-loads a
+        # module.
+        echo ${pkgs.kmod}/bin/modprobe > /proc/sys/kernel/modprobe
+      '';
+
+  };
+
+}