configs: add configs for bletchley

Add configurations for bletchley to support USB debug card.

Signed-off-by: Potin Lai <potin.lai@quantatw.com>
Change-Id: I08f92490a6ebccb19a06639fd93c2488079bc1e0
diff --git a/configs/bletchley/post_desc.json b/configs/bletchley/post_desc.json
new file mode 100644
index 0000000..7957967
--- /dev/null
+++ b/configs/bletchley/post_desc.json
@@ -0,0 +1,9 @@
+{
+"Phase1": [
+  [ "0x00", "" ]
+],
+
+"Phase2": [
+  [ "0x00", "" ]
+]
+}