MAC: add new Murata range

New herolte OUI observed: 1c:70:22
Checked on hwaddress.com

Change-Id: I4a2c15e315b46af81f815114cf85f0d1cced87f3
(cherry picked from commit ba6c738c2f39fc1011ae5f61067f84b1bf430111)
diff --git a/macloader/macaddr_mappings.h b/macloader/macaddr_mappings.h
index 96786e7..b5c60a6 100644
--- a/macloader/macaddr_mappings.h
+++ b/macloader/macaddr_mappings.h
@@ -54,6 +54,7 @@
         "10:a5:d0",
         "10:d5:42",
         "14:7d:c5",
+        "1c:70:22",
         "1c:99:4c",
         "20:02:af",
         "40:f3:08",