checkpatch.conf: ignore rspro generated files

Change-Id: I6e5d57f6669f7d1aff00898f1375843b53cd9b9f
diff --git a/.checkpatch.conf b/.checkpatch.conf
new file mode 100644
index 0000000..b060a3b
--- /dev/null
+++ b/.checkpatch.conf
@@ -0,0 +1,2 @@
+--exclude ^src/rspro/.*\.c$
+--exclude ^include/osmocom/rspro/.*\.h$