Adding upstream version 1.7.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

.checkpatch.conf

@@ -0,0 +1,24 @@
+# Checkpatch options.
+# REF: https://docs.kernel.org/dev-tools/checkpatch.html
+
+# This isn't actually a Linux kernel tree
+--no-tree
+
+--max-line-length=120
+
+--ignore EMAIL_SUBJECT
+
+# FILE_PATH_CHANGES reports this kind of message:
+# "added, moved or deleted file(s), does MAINTAINERS need updating?"
+--ignore FILE_PATH_CHANGES
+
+
+# Commit messages might contain a Gerrit Change-Id.
+--ignore GERRIT_CHANGE_ID
+
+# Do not check the format of commit messages, as Gerrit's merge commits do not
+# preserve it.
+--ignore GIT_COMMIT_ID
+
+# Avoid "Does not appear to be a unified-diff format patch" message
+--ignore NOT_UNIFIED_DIFF