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.com


Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>