dt-bindings: add Kontron vendor prefix

Kontron is a leading embedded computer supplier. More information can be
found on: https://www.kontron.de/Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -479,6 +479,8 @@ patternProperties:
     description: Rakuten Kobo Inc.
   "^koe,.*":
     description: Kaohsiung Opto-Electronics Inc.
+  "^kontron,.*":
+    description: Kontron S&T AG
   "^kosagi,.*":
     description: Sutajio Ko-Usagi PTE Ltd.
   "^kyo,.*":