dt-bindings: vendor-prefixes: Add prefix for Huiling

Shenzhen Huiling Information Technology Co. Ltd. specializes in the
research and manufacturing of display and touch screens for industrial
usage. https://en.szhuiling.com/



Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20250603193930.323607-2-macroalpha82@gmail.com