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/tools/misc/grub/grub1.patches.sh

@@ -0,0 +1,70 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -p nix -i bash --pure
+
+# Does like `maintainers/scripts/debian-patches.sh`, but specialized for
+# grub1 patches, and using the new salsa service.
+
+# Most common usage: `pkgs/tools/misc/grub/grub1.patches.sh pkgs/tools/misc/grub/grub1.patches.nix`
+# That is, after updating the script with the new list from the series file,
+# removing (by commenting) patches as required.
+
+set -e
+set -u
+
+# https://salsa.debian.org/grub-team/grub-legacy/tree/master/debian/patches
+SERIES=(
+    snapshot.patch
+    menu.lst_gnu-hurd.patch
+    graphics.patch
+    raid.patch
+    raid_cciss.patch
+    xfs_freeze.patch
+    2gb_limit.patch
+    grub-special_device_names.patch
+    grub-xvd_drives.patch
+    initrd_max_address.patch
+    splashimage_help.patch
+    grub-install_addsyncs.patch
+    grub-install_regexp.patch
+    grub-install_aoe_support.patch
+    grub-install_xvd.patch
+    geometry-26kernel.patch
+    print_func.patch
+    mprotect.patch
+    savedefault.patch
+    find-grub-dir.patch
+    intelmac.patch
+    crossreference_manpages.patch
+    ext3_256byte_inode.patch
+    # Breaks on NixOS.
+    #use_grub-probe_in_grub-install.patch
+    objcopy-absolute.patch
+    no-reorder-functions.patch
+
+    # We aren't building amd64 binaries, see #244498
+    #fix_amd64_compile.patch
+    modern-automake.patch
+    no-combine-stack-adjustments.patch
+    no-pie.patch
+)
+
+# Revision mapping to current tip of the 0.97-73 branch.
+rev="1dad5507d74ef97fdd3c6cf2a028084f6f2850c3"
+prefix="https://salsa.debian.org/grub-team/grub-legacy/raw/${rev}/debian/patches"
+FILE="$1"
+shift
+
+cat <<EOF > "$FILE"
+# Generated by grub1-patches.sh
+let
+  prefix = "${prefix}";
+in
+[
+EOF
+
+for PATCH in "${SERIES[@]}"; do
+    URL="$prefix/$PATCH"
+    HASH="$(nix-prefetch-url "$URL")"
+    echo "{ url = \"\${prefix}/$PATCH\"; sha256 = \"$HASH\"; }" >> "$FILE"
+done
+echo "]" >> "$FILE"