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/build-support/kernel/make-initrd.sh

@@ -0,0 +1,51 @@
+source $stdenv/setup
+
+set -o pipefail
+
+objects=($objects)
+symlinks=($symlinks)
+suffices=($suffices)
+
+mkdir root
+
+# Needed for splash_helper, which gets run before init.
+mkdir root/dev
+mkdir root/sys
+mkdir root/proc
+
+
+for ((n = 0; n < ${#objects[*]}; n++)); do
+    object=${objects[$n]}
+    symlink=${symlinks[$n]}
+    suffix=${suffices[$n]}
+    if test "$suffix" = none; then suffix=; fi
+
+    mkdir -p $(dirname root/$symlink)
+    ln -s $object$suffix root/$symlink
+done
+
+
+# Get the paths in the closure of `object'.
+storePaths=$(perl $pathsFromGraph closure-*)
+
+
+# Paths in cpio archives *must* be relative, otherwise the kernel
+# won't unpack 'em.
+(cd root && cp -prP --parents $storePaths .)
+
+
+# Put the closure in a gzipped cpio archive.
+mkdir -p $out
+for PREP in $prepend; do
+  cat $PREP >> $out/initrd
+done
+(cd root && find * .[^.*] -exec touch -h -d '@1' '{}' +)
+(cd root && find * .[^.*] -print0 | sort -z | bsdtar --uid 0 --gid 0 -cnf - -T - | bsdtar --null -cf - --format=newc @- | eval -- $compress >> "$out/initrd")
+
+if [ -n "$makeUInitrd" ]; then
+    mkimage -A "$uInitrdArch" -O linux -T ramdisk -C "$uInitrdCompression" -d "$out/initrd" $out/initrd.img
+    # Compatibility symlink
+    ln -sf "initrd.img" "$out/initrd"
+else
+    ln -s "initrd" "$out/initrd$extension"
+fi