dt-bindings: vendor-prefixes: add Hynitron vendor prefix

Hynitron is a company based in Shanghai that makes controller ICs for
touchscreens.

http://www.hynitron.com/Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221028202636.14341-2-macroalpha82@gmail.comSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -567,6 +567,8 @@ patternProperties:
     description: Hycon Technology Corp.
   "^hydis,.*":
     description: Hydis Technologies
+  "^hynitron,.*":
+    description: Shanghai Hynitron Microelectronics Co. Ltd.
   "^hynix,.*":
     description: SK Hynix Inc.
   "^hyundai,.*":